Articoli di riviste sul tema "Seismic"
Segui questo link per vedere altri tipi di pubblicazioni sul tema: Seismic.
Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili
Vedi i top-50 articoli di riviste per l'attività di ricerca sul tema "Seismic".
Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.
Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.
Vedi gli articoli di riviste di molte aree scientifiche e compila una bibliografia corretta.
1
Subarsyah, Subarsyah, e Yulinar Firdaus. "PERBAIKAN CITRA PENAMPANG SEISMIK MENGGUNAKAN METODE COMMON REFLECTION SURFACE : APLIKASI TERHADAP DATA SEISMIK PERAIRAN WAIGEO". JURNAL GEOLOGI KELAUTAN 13, n. 2 (16 febbraio 2016): 119. http://dx.doi.org/10.32693/jgk.13.2.2015.267.
Testo completoAbstract (sommario):
Kenampakan struktur geologi dan kontinuitas reflektor pada penampang seismik seringkali tidak teridentifikasi ketika data seismik di stack menggunakan metode stacking konvensional, terutama untuk data dengan jumlah fold coverage yang kecil. Data seismik Puslitbang Geologi Kelautan yang diperoleh pada Mei 2015, di Perairan Timur Pulau Waigeo, memiliki fold coverage yang relatif rendah sekitar 20. Untuk meningkatkan kualitas penampang seismik pada data ini perlu diterapkan metode Common Reflection Surface(CRS) sehingga interpretasi struktur geologi lebih mudah dan kontinuitas reflektor lebih baik. Metode ini diaplikasikan terhadap data seismik lintasan 6 dan 37. Penerapan metode CRS memberikan perbaikan pada citra penampang seismik terutama pada bagian basement akustik dan kontinuitas reflektor. Metode ini memberikan citra penampang seismik yang relatif lebih baik dibandingkan metode stacking konvensional karena metode CRS melibatkan trace seismik dari CDP di sekitarnya sesuai dengan besar parameter aperturnya. Kata kunci CRS Stack, CRS Attribut dan Paraxial Geological structure and reflector continuity on seismic section are often not clearly identified when the seismic data stacked use conventional stacking, especially seismic data with small fold coverage. Seismics data of Puslitbang Geologi Kelautan, that have been acquired on Mei 2015,in eastern part of Waigeo Island, have small number of fold coverage about 20. To enhance quality of seismic section on this data, it is necessary to apply Common Reflection Surface (CRS) method, in order to make geological structure interpretation easier dan better reflector continuity. This method applied to seismic data line 6 and 37. This application gives enhancement to seismic section especially at acoustic basement and reflector continuity. CRS method gives better seismic section than conventional stacking due to stacking process that involve seismic trace around the CDP along its aperture size. Keywords: CRS Stack, CRS Attribut and Paraxial
2
Sarkar, Subir, Adrita Choudhuri, Santanu Banerjee, A. J. (Tom) Van Loon e Pradip K. Bose. "Seismic and non-seismic soft-sediment deformation structures in the Proterozoic Bhander Limestone, central India". Geologos 20, n. 2 (8 luglio 2014): 89–103. http://dx.doi.org/10.2478/logos-2014-0008.
Testo completoAbstract (sommario):
Abstract Numerous soft-sediment deformation structures occur within the Proterozoic Bhander Limestone of an intracratonic sag basin in a 750 m long section along the Thomas River, near Maihar, central India. Part of these deformation structures have most probably a non-seismic origin, but other structures are interpreted as resulting from earthquake-induced shocks. These seismic structures are concentrated in a 60 cm thick interval, which is interpreted as three stacked seismi-tes. These three seismites are traceable over the entire length of the section. They divide the sedimentary succession in a lower part (including the seismites) deposited in a hypersaline lagoon, and an upper open-marine (shelf) part. Most of the soft-sediment deformations outside the seismite interval occur in a lagoonal intraclastic and muddy facies association. The SSDS within the seismite interval show a lateral continuity. They record simultaneous fluidisation and liquefaction. The bases of each of the three composing seismite bands are defined by small-scale shear folds, probably recording an earthquake and aftershocks. The presence of the three seismite bands at the boundary between the lagoonal and the overlying open-marine oolitic facies association suggests that the seismic event also triggered basin subsidence.
3
Puspasari, Trevi Jayanti, e Sumirah Sumirah. "APLIKASI METODE PSEUDO 3D SEISMIK DI CEKUNGAN JAWA BARAT UTARA MENGGUNAKAN K.R. BARUNA JAYA II". Oseanika 1, n. 2 (14 gennaio 2021): 1–12. http://dx.doi.org/10.29122/oseanika.v1i2.4562.
Testo completoAbstract (sommario):
ABSTRAK
Tuntutan untuk mengikuti perkembangan kebutuhan industri migas menjadi motivasi dalam mengembangkan teknik penerapan dan aplikasi akuisisi seismik multichannel 2D. Perkembangan kebutuhan eksplorasi industri migas tidak diimbangi dengan anggaran peningkatan alat survei seismik milik negara termasuk yang terpasang di K.R. Baruna Jaya II – BPPT. Penerapan metode pseudo 3D pada disain survei dan pengolahan data dapat menjadi solusi efektif dan efisien dalam mengatasi persoalan tersebut. Metode Pseudo 3D merupakan suatu teknik akuisisi dan pengolahan data dengan menitik beratkan pada disain akuisisi dan inovasi pengolahan data seismik 2D menghasilkan penampang keruangan (3D) berdasarkan input data seismik yang hanya 2D. Penelitian ini bertujuan untuk mengaplikasikan metode pseudo 3D seismik di Cekungan Jawa Barat Utara menggunakan wahana KR. Baruna Jaya II yang dilakukan pada Desember 2009. Sebagai hasil, pengolahan data 2D lanjutan telah dilakukan dan diperoleh profil penampang seismik keruangan (3D). Profil hasil pengolahan data Pseudo 3D ini dapat menjadi acuan dalam pengambilan keputusan dan rencana survei berikutnya.
Kata Kunci: Seismik Pseudo 3D, Seismik multichannel 2D, K.R. Baruna Jaya II, Cekungan Jawa Barat Utara.
ABSTRACT
[Aplication of Seismic Pseudo 3D in Nort West Java Basin Using K.R. Baruna Jaya II]
The demand to follow the growth of needs in the oil and gas industry is a motivation in the developing of techniques for assessment and applying 2D multichannel seismic acquisition. The development of exploration needs for the oil and gas industry is not matched by budget for an upgrade Government’s seismic equipment including equipment installed in K.R. Baruna Jaya II. Applied Pseudo 3D method in survey and seismic data processing can be an effective and efficient solution. The pseudo 3D method is a data acquisition and processing technique with an emphasis on the acquisition design and 2D seismic data processing innovation to produce a 3D seismic volume. This study aims to apply the pseudo 3D seismic method in the North West Java Basin using the K.R. Baruna Jaya II which was held in Desember 2009. As a Result, advanced seismic processing was carried out to output a seismic volume (3D) profile. This profile can be used as a reference in making decisions and planning the next survey.
Keywords: Pseudo 3D Seismic, Seismic 2D multichannel, K.R. Baruna Jaya II, Nort West Java Basin.
4
By, T. L. "Crosshole seismics and seismic tomography". Geoexploration 24, n. 3 (ottobre 1987): 275–76. http://dx.doi.org/10.1016/0016-7142(87)90072-x.
Testo completo
5
Sari, Anggun Mayang, e Afnindar Fakhrurrozi. "SEISMIC HAZARD MICROZONATION BASED ON PROBABILITY SEISMIC HAZARD ANALYSIS IN BANDUNG BASIN". RISET Geologi dan Pertambangan 30, n. 2 (30 dicembre 2020): 215. http://dx.doi.org/10.14203/risetgeotam2020.v30.1138.
Testo completoAbstract (sommario):
The geological and seismic-tectonic setting in the Bandung Basin area proliferates the seismicity risk. Thus, it is necessary to investigate the seismic hazards caused by the foremost seismic source that affects the ground motions in the bedrock. This research employed Probability Seismic Hazard Analysis (PSHA) method to determine the peak ground acceleration value. It considers the source of the earthquakes in the radius of 500 km with a return period of 2500 years. The analysis results showed that the Peak Ground Acceleration (PGA) in this region varies from 0.46 g to 0.70 g. It correlates with the magnitude and hypocentre of the dominant earthquake source of the study locations. The PGA value on the bedrock was used as an input to develop the seismic hazard microzonation map. It was composed using the Geographic Information System (GIS) to visualise the result. This research provides a scientific foundation for constructing residential buildings and infrastructure, particularly as earthquake loads in the building structure design calculations. ABSTRACT - Mikrozonasi Bahaya Seismik Berdasarkan Probability Seismic Hazard Analysis di Cekungan Bandung. Kondisi geologi dan seismik-tektonik di Cekungan Bandung meningkatkan risiko kegempaan di wilayah tersebut. Oleh karena itu, perlu dilakukan penelitian tentang bahaya seismik yang disebabkan oleh sumber-sumber gempa di sekitarnya yang mempengaruhi gelombang gempa di batuan dasar. Penelitian ini menggunakan metode Probability Seismic Hazard Analysis (PSHA) untuk menentukan nilai percepatan gelombang gempa di batuan dasar. Lebih lanjut penelitian ini menggunakan sumber gempa dalam radius 500 km dengan periode perulangan 2500 tahun. Hasil analisis menunjukkan bahwa Peak Ground Acceleration (PGA) di wilayah ini bervariasi dari 0,46 g hingga 0,70 g. Hal ini berkorelasi dengan magnitudo dan jarak hiposenter sumber gempa dominan terhadap lokasi penelitian. Nilai PGA di batuan dasar digunakan sebagai input data dalam pembuatan peta mikrozonasi bahaya seismik. Peta mikrozonasi bahaya seismik disusun dan divisualisasikan menggunakan Sistem Informasi Geografis (SIG). Luaran penelitian ini menghasilkan landasan ilmiah pada konstruksi bangunan tempat tinggal dan infrastruktur, khususnya sebagai pembebanan gempa dalam perhitungan desain struktur bangunan.
6
Kamiludin, Udaya, I. Nyoman Astawa e Moch Akrom Mustafa. "INDIKASI KETERDAPATAN ENDAPAN PLASER PEMBAWA TIMAH DAN UNSUR TANAH JARANG (REE), DI PERAIRAN TODAK, SINGKEP, KEPULAUAN RIAU". JURNAL GEOLOGI KELAUTAN 13, n. 2 (16 febbraio 2016): 109. http://dx.doi.org/10.32693/jgk.13.2.2015.266.
Testo completoAbstract (sommario):
Penelitian geofisika di Perairan Todak, Singkep, Kepulauan Riau menggunakan seperangkat peralatan seismik pantul dangkal saluran tunggal. Tujuan penelitian ini adalah untuk menunjang penelitian keterdapatan endapan plaser pembawa timah dan unsur tanah jarang (REE). Hasil interpretasi rekaman seismik diperoleh terdapatnya lembah/mangkuk yang terbentuk secara alami akibat adanya terobosan batuan granit, di mana lembah/mangkuk-mangkuk ini merupakan tempat terjadinya sedimentasi dari hasil pelapukan batuan di sekitarnya. Hasil interpretasi rekaman seismik pantul saluran tunggal analog di perairan Todak, Singkep, dapat diklasifikasikan menjadi 3 runtunan yaitu runtunan A, B, dan runtunan C.Kata kunci Data seismik, endapan plaser, lembah/mangkuk, Perairan Todak. Geophysical research at Todak, Singkep, Riau Archipelago Province, by using single channel sahllow seismic refletion. The purpose of research is to support placer deposit bearing tin and rare earth element research at this area. From seismic interpretation can be recognized the distribution of valley/bowls which is naturally formed, caused by granite rock intrusion. Those valleys are sedimentation places of wheathered rock from the surrounding area. Beside that, the seismic research also for determining the placer deposit thickness. Interpratation of analog single channel seismic records in the Todak waters, Singkep, result 3 seismic sequences and intrusive feature, A sequences, B, and C. Keywords: Seismic data, placer deposit, valley/basin, Todak Watres.
7
Maiti, Bikas. "Seismic Pressure and Seismic Bearing Capacity of Foundations". International Journal of Psychosocial Rehabilitation 24, n. 5 (30 maggio 2020): 7297–303. http://dx.doi.org/10.37200/ijpr/v24i5/pr2020762.
Testo completo
8
Sidiq, Aditya P., Henry M. Manik e Tumpal B. Nainggolan. "STUDI KOMPARASI METODE MIGRASI SEISMIK DALAM MENGKARAKTERISASI RESERVOIR MIGAS DI BLOK KANGEAN, LAUT BALI MENGGUNAKAN INVERSI IMPEDANSI AKUSTIK BERBASIS MODEL". Jurnal Ilmu dan Teknologi Kelautan Tropis 11, n. 1 (1 aprile 2019): 205–19. http://dx.doi.org/10.29244/jitkt.v11i1.23028.
Testo completoAbstract (sommario):
ABSTRAK Karakterisasi reservoir menjadi penting dalam tahapan eksplorasi minyak dan gas bumi. Salah satu hal yang dibutuhkan untuk mencapai keakuratan dalam mengkarakterisasi reservoir adalah penampang seismik yang sesuai dengan penampang aslinya. Struktur lapisan bumi yang kompleks mengakibatkan gelombang terdifraksi, sehingga penampang seismik mengalami pembelokan dari posisi sebenarnya. Penelitian ini menerapkan metode migrasi seismik Kirchhoff dan Stolt (F-K) untuk mengembalikan posisi reflektor pada waktu dan kedalaman yang sebenarnya pada data seismik 2D di Perairan Utara Bali. Data seismik diintegrasikan dengan data sumur APS-1 sebagai kontrol untuk diinversikan dengan teknik inversi berbasis model sehingga dapat mengkarakterisasi reservoir. Penelitian ini bertujuan membandingkan hasil migrasi seismik yaitu migrasi Stolt dan migrasi Kirchhoff untuk diinversikan menggunakan metode inversi berbasis model sehingga dapat diketahui sejauh mana kualitas data seismik mempengaruhi proses karakterisasi reservoir. Nilai korelasi dari hasil analisis regresi antara log impedansi inversi dengan log impedansi data sumur pada migrasi Kirchhoff sebesar 0,739 dan galat regresi sebesar 873,54, sedangkan pada migrasi Stolt memiliki nilai korelasi sebesar 0,698 dan nilai galat sebesar 1236,17. Hal ini menunjukkan bahwa migrasi Kirchhoff lebih baik dari migrasi Stolt baik secara kualitatif maupun kuantitatif dalam mengkarakterisasi reservoir hidrokarbon. ABSTRACTReservoir characterization is an important method in gas and oil exploration. In order to obtain accuracy for defining reservoir, required seismic image that similar to the actual seismic image. The complexity of earth structure could cause diffracted waves, therefore, seismic image was diffracted from its actual position. This study applies Kirchhoff and Stolt (F-K) seismic migration methods to restore the position of the reflector at the actual time and depth seismic data in North Bali. Seismic data is integrated with APS-1 well data as controls to be converted with model-based inversion techniques so as to characterize the reservoir. This study aims to compare the results of seismic migration namely Stolt and Kirchhoff migration to be converted using a model-based inversion method so that it can be seen to what extent the quality of seismic data influences the reservoir characterization process. Correlation value from the results of regression analysis between inversion log impedance and well impedance log data in Kirchhoff migration is 0.739 and regression error is 873.54, while the Stolt migration has a correlation value of 0.698 and an error value of 1236.17. This shows that Kirchhoff's migration is better than Stolt migration both qualitatively and quantitatively in characterizing hydrocarbon reservoirs.
9
Heidebrecht, A. C., e N. Naumoski. "Evaluation of site-specific seismic design requirements for three Canadian cities". Canadian Journal of Civil Engineering 15, n. 3 (1 giugno 1988): 409–23. http://dx.doi.org/10.1139/l88-056.
Testo completoAbstract (sommario):
Siesmic design requirements as specified in building codes normally use a generic approach in which the seismic response is independent of the site location, except for a single intensity-related parameter used to define the severity of the expected ground motion. In reality, the characteristics of earthquakes that influence structural response depend on both the level of seismic motion and the seismo-tectonic environment at the specific location. This paper describes a methodology for determining seismic design requirements that uses both magnitude (M) and epicentral distance (R) to define the seismo-tectonic environment. Ensembles of actual seismic strong motion records are selected to match the combinations of M and R that dominate the seismic risk at a specific location. These time histories are used to determine both response spectra and seismic response factors (as used in the 1985 edition of the National Building Code, NBCC 1985) for the location in question. This paper applies this methodology to Vancouver, Ottawa, and Quebec City and compares the results with the response spectra and seismic response factors specified in NBCC 1985. The results indicate that a site-specific investigation of seismic design requirements is important in distinguishing between locations having different seismo-tectonic environments. Key words: structures, design, seismic, code, dynamic, acceleration, velocity, spectra, magnitude, epicentral distance.
10
Nainggolan, Tumpal Benhard, e Subarsyah Subarsyah. "SUPPRESSING DIFFRACTION EFFECT USING KIRCHHOFF PRE-STACK TIME MIGRATION ON 2D SEISMIC MULTICHANNEL DATA AT FLORES SEA". BULLETIN OF THE MARINE GEOLOGY 29, n. 2 (15 febbraio 2016): 71. http://dx.doi.org/10.32693/bomg.29.2.2014.67.
Testo completoAbstract (sommario):
2D seismic multichannel survey has been carried out by Marine Geological Institute of Indonesia to interpret imaging and sub-surface geological information in the Flores Sea. Seismic data processing starts from pre-processing until migration stage. Migration is an important stage in the seismic processing, because at this stage the effects of diffraction and oblique reflectors caused by fault, salt domes, wedging, etc. will be repositioned to the actual points. One example of diffraction effects can be seen on the seismic section of a conventional stacking that have not migrated, i.e. resulting in an apparent bowtie reflector. Geologists find difficulties in interpreting geological information from diffracted seismic section, so it needs further processing to overcome the effects. By using Kirchhoff method and carried out during the Pre-Stack Time Migration (PSTM), this method turns out to produce migrated seismic section which is much better than conventional stacked one. This is due to the Kirchhoff method suppressed the identified diffraction effects, so that the geologist can interpret geological structure of the resulting migrated seismic section of the Flores Sea.
Keywords : 2D seismic multichannel, diffraction, Pre-Stack Time Migration (PSTM), Kirchhoff method.
A Survei seismik 2D multichannel dilaksanakan oleh Marine Geological Institute of Indonesia untuk mengetahui gambaran serta informasi geologi bawah permukaan Laut Flores. Pengolahan data seismik dimulai dari pre-processing sampai tahap migration. Tahap migration merupakan tahap terpenting dalam pengolahan data seismik, oleh karena pada tahap ini efek difraksi dan reflektor miring yang diakibatkan oleh sesar, kubah garam, pembajian, dan lain-lain akan dikembalikan pada keadaan sebenarnya. Salah satu contoh adanya efek difraksi bisa dilihat pada penampang stacking konvensional yaitu “bowtie†yang mengakibatkan terjadinya reflektor semu pada penampang seismik. Efek difraksi “bowtie†sangat menyulitkan para peneliti dalam memperoleh informasi geologi, sehingga perlu adanya proses lebih lanjut untuk mengatasi efek tersebut. Salah satu metode migrasi yang berkembang saat ini yaitu metode Kirchhoff dan dilakukan pada saat Pre-Stack Time Migration (PSTM), menunjukkan hasil penampang jauh lebih baik daripada penampang stacking konvensional. Hal ini terjadi karena pada metode Kirchhoff Pre-Stack Time Migration, efek difraksi tersebut ditekan lebih awal sehingga penampang yang dihasilkan mampu menggambarkan struktur geologi permukaan Laut Flores Sea. Kata kunci : seismik 2D multikanal, difraksi, Pre-Stack Time Migration (PSTM), metode Kirchhoff.
11
Aiello, Gemma. "Submarine Stratigraphy of the Eastern Bay of Naples: New Seismo-Stratigraphic Data and Implications for the Somma-Vesuvius and Campi Flegrei Volcanic Activity". Journal of Marine Science and Engineering 10, n. 10 (18 ottobre 2022): 1520. http://dx.doi.org/10.3390/jmse10101520.
Testo completoAbstract (sommario):
The submarine stratigraphy of the eastern Bay of Naples is studied through seismo-stratigraphic data correlated with borehole data. Multichannel seismic profiles are interpreted in order to reconstruct the stratigraphic relationships between the Quaternary marine seismic units and the volcanic acoustic substratum. Seven seismic units are recognized based on the geological interpretation of seismic profiles and using seismo-stratigraphic criteria. The top of the lowest seismic unit was correlated with the Campanian Ignimbrite (Southern Campania Volcanic Zone). The stratigraphic setting of the eastern Bay of Naples is characterized by NE-SW trending seismic structures, probably corresponding with tuff rings. These tuff rings can be compared with the Porto Miseno, the Archiaverno and Averno, and the Astroni tuff rings (Campi Flegrei). Offshore, the Somma-Vesuvius a seismic unit was interpreted as the fallout deposits representing the base of the AD 79 eruption. However, since a branch of the isopach of 5 m of the “Pomici di Avellino” pyroclastic deposits is very close to the Tyrrhenian coastline and near our GRNA01 and GRNA03 seismic profiles, we cannot exclude that the seismic unit could be also correlated with the deposits of this eruption.
12
Taufik, Imam. "RAPID SEISMIC SCREENING PADA JEMBATAN DI KABUPATEN PATI MENGGUNAKAN METODE FILIATRAULT". Jurnal HPJI 9, n. 1 (30 gennaio 2023): 49–56. http://dx.doi.org/10.26593/jhpji.v9i1.6440.49-56.
Testo completoAbstract (sommario):
Abstract
Indonesia is a country that has a very high level of vulnerability to earthquakes. However, it is very rare for bridges in rural areas or in sub-districts to be evaluated or screened. As a result, many bridges are prone to damage when seismic earthquakes occur, even though bridges are an important infrastructure for the village for the village's economic progress. This research was conducted with the aim of conducting a quick seismic inspection of the bridge and obtaining a priority order for bridge repair using the Seismic Vulnerability Index (SVI) method. The analysis was carried out on the sample, which consisted of 4 bridges located in Pati Regency. The results of the SVI analysis show that of the 4 observed bridges, the Tanjang Bridge has the highest Seismic Vulnerability Index, so it is recommended that this bridge get the first repair priority.
Keywords: earthquake; earthquake prone; bridge; Seismic Susceptibility Index; improvement priority
Abstrak
Indonesia merupakan suatu negara yang mempunyai tingkat kerawanan terhadap gempa bumi yang sangat tinggi. Namun, sangat jarang jembatan-jembatan yang berada di perdesaan atau di kecamatan dievaluasi atau dilakukan screening. Akibatnya, banyak jembatan yang rawan rusak saat terjadi peristiwa gempa bumi seismik padahal jembatan merupakan suatu infrastruktur penting bagi desa untuk kemajuan ekonomi desa tersebut. Penelitian ini dilakukan dengan tujuan untuk melakukan pemeriksaan seismik jembatan secara cepat dan mendapatkan urutan prioritas perbaikan jembatan dengan menggunakan metode Indeks Kerentanan Seismik (SVI). Analisis dilakukan terhadap sampel, yang terdiri atas 4 jembatan yang terletak di Kabupaten Pati. Hasil analisis SVI menunjukkan bahwa dari keempat jembatan yang diamati, Jembatan Tanjang mempunyai Indeks Kerentanan Seismik yang paling tinggi, sehingga jembatan ini direkomendasikan untuk mendapatkan prioritas perbaikan yang pertama.
Kata-kata kunci: gempa bumi; rawan gempa; jembatan; Indeks Kerentanan Seismik; prioritas perbaikan
13
Solovyeva, M. A., A. V. Starovoytov, G. G. Akhmanov, O. M. Khlystov, A. V. Khabuev, M. J. Tokarev e D. A. Chensky. "The evolution of slump-induced destruction of Kukuy Griva slope (lake Baikal) revealed on the base of the data of seismic and acoustic surveys". Moscow University Bulletin. Series 4. Geology, n. 5 (28 ottobre 2016): 47–59. http://dx.doi.org/10.33623/0579-9406-2016-5-47-59.
Testo completoAbstract (sommario):
As a result of careful interpretation of the data of recent seismo-acoustic surveys, two major seismic complexes were identified in the structure of upper sedimentary section of the north-western slope of Kukuy Griva (ridge). They are composed of several very characteristic inner seismo-facies and separated by well-expressed regional reflector. Seismic and acoustic data revealed evidences of numerous landslide processes which were different in age and peculiarities of manifestation. For the first time, detailed schemes of seismo-facies distribution are compiled for both major seismic complexes. The boundary between seismic complexes is dated as 150 thousands years. It is shown that sliding was more intensive during Late Pleistocene and Holocene, reflecting activation of tectonic movements in this part of Baikal rift system.
14
Grana, Dario, e Ernesto Della Rossa. "Probabilistic petrophysical-properties estimation integrating statistical rock physics with seismic inversion". GEOPHYSICS 75, n. 3 (maggio 2010): O21—O37. http://dx.doi.org/10.1190/1.3386676.
Testo completoAbstract (sommario):
A joint estimation of petrophysical properties is proposed that combines statistical rock physics and Bayesian seismic inversion. Because elastic attributes are correlated with petrophysical variables (effective porosity, clay content, and water saturation) and this physical link is associated with uncertainties, the petrophysical-properties estimation from seismic data can be seen as a Bayesian inversion problem. The purpose of this work was to develop a strategy for estimating the probability distributions of petrophysical parameters and litho-fluid classes from seismics. Estimation of reservoir properties and the associated uncertainty was performed in three steps: linearized seismic inversion to estimate the probabilities of elastic parameters, probabilistic upscaling to include the scale-changes effect, and petrophysical inversion to estimate the probabilities of petrophysical variables andlitho-fluid classes. Rock-physics equations provide the linkbetween reservoir properties and velocities, and linearized seismic modeling connects velocities and density to seismic amplitude. A full Bayesian approach was adopted to propagate uncertainty from seismics to petrophysics in an integrated framework that takes into account different sources of uncertainty: heterogeneity of the real data, approximation of physical models, measurement errors, and scale changes. The method has been tested, as a feasibility step, on real well data and synthetic seismic data to show reliable propagation of the uncertainty through the three different steps and to compare two statistical approaches: parametric and nonparametric. Application to a real reservoir study (including data from two wells and partially stacked seismic volumes) has provided as a main result the probability densities of petrophysical properties and litho-fluid classes. It demonstrated the applicability of the proposed inversion method.
15
Stemland, Helene Meling, Tor Arne Johansen e Bent Ole Ruud. "Potential Use of Time-Lapse Surface Seismics for Monitoring Thawing of the Terrestrial Arctic". Applied Sciences 10, n. 5 (9 marzo 2020): 1875. http://dx.doi.org/10.3390/app10051875.
Testo completoAbstract (sommario):
The terrestrial Arctic is warming rapidly, causing changes in the degree of freezing of the upper sediments, which the mechanical properties of unconsolidated sediments strongly depend upon. This study investigates the potential of using time-lapse surface seismics to monitor thawing of currently (partly) frozen ground utilizing synthetic and real seismic data. First, we construct a simple geological model having an initial temperature of −5 °C, and infer constant surface temperatures of −5 °C, +1 °C, +5 °C, and +10 °C for four years to this model. The geological models inferred by the various thermal regimes are converted to seismic models using rock physics modeling and subsequently seismic modeling based on wavenumber integration. Real seismic data reflecting altered surface temperatures were acquired by repeated experiments in the Norwegian Arctic during early autumn to mid-winter. Comparison of the surface wave characteristics of both synthetic and real seismic data reveals time-lapse effects that are related to thawing caused by varying surface temperatures. In particular, the surface wave dispersion is sensitive to the degree of freezing in unconsolidated sediments. This demonstrates the potential of using surface seismics for Arctic climate monitoring, but inversion of dispersion curves and knowledge of the local near-surface geology is important for such studies to be conclusive.
16
M., MADHUSUDHAN REDDY. "Declustering Seismic Data for Catalogue Completeness Analysis and Characterization of Seismic Sources". Journal of Research on the Lepidoptera 51, n. 1 (28 febbraio 2020): 209–26. http://dx.doi.org/10.36872/lepi/v51i1/301018.
Testo completo
17
F, Bouchaala. "Seismic Wave Attenuation: A Promising Seismic Attribute for Gas and Oil Industry". Petroleum & Petrochemical Engineering Journal 5, n. 4 (2021): 1–3. http://dx.doi.org/10.23880/ppej-16000281.
Testo completo
18
Rahardiawan, Riza, e Catur Purwanto. "STRUKTUR GEOLOGI LAUT FLORES, NUSA TENGGARA TIMUR". JURNAL GEOLOGI KELAUTAN 12, n. 3 (16 febbraio 2016): 153. http://dx.doi.org/10.32693/jgk.12.3.2014.256.
Testo completoAbstract (sommario):
Tujuan penelitian seismik saluran banyak di Laut Flores, Nusa Tenggara Timur adalah untuk mengetahui kondisi geologi bawah permukaan dasar laut. Daerah penelitian merupakan daerah yang aktif secara tektonik dan diekspresikan dalam bentuk prisma akresi, vulkanik tidak aktif dan sesar-sesar aktif yang membentuk morfologi dasar laut. Berdasarkan penafsiran stratigrafi seismik lapisan bawah permukaan dasar laut terdiri dari empat satuan batuan: Batuan Dasar, Prisma Akresi, Gunungapi Bawah Laut, dan Sedimen Klastika. Sedimen Klastika ini dibagi menjadi lima unit.
Kata kunci: seismik, morfologi dasar laut, sesar aktif, Laut Flores
The purpose of the study of seismic multi channel in Flores Sea, East Nusa Tenggara is to recognize subsurface geology condition. The study area is an active tectonic that expressed by accretion prisms, inactive vulcanic and active faults form seabed morphology. Based on seismic stratigraphy interpretation, the study area is composed of four rocks units: Basement rocks, Accretionary Wedge, Seamount, and Clastic Sediments. This clactic sediment is divided into five units.
Keywords: seismic, seabed morphology, active fault, Flores Sea
19
Astawa, Nyoman, Imelda R. Silalahi e Riza Rahardiawan. "GEOLOGI BAWAH PERMUKAAN DASAR LAUTPERAIRAN LEMBAR PETA 0421, DAERAH ISTIMEWA ACEH". JURNAL GEOLOGI KELAUTAN 10, n. 2 (16 febbraio 2016): 101. http://dx.doi.org/10.32693/jgk.10.2.2012.220.
Testo completoAbstract (sommario):
Hasil kegiatan penelitian geologi kelautan Lembar Peta 0421menghasilkan data seismik dan pemeruman sepanjang lebih kurang 963,73 kilometer. Dari peta batimetri ditemukan beberapa kelurusan dengan arah hampir baratlaut-tenggara dan diduga merupakan sesar.
Hasil penafsiran data menunjukkan bahwa stratigrafi rekaman seismik, daerah penelitian secara garis besar dapat dibagi menjadi 4 (empat) unit yaitu unit 1; unit 2; unit 3, dan unit 4. Jika dikaitkan dengan geologi regional daerah penelitian, unit 1 diduga dapat disebandingkan dengan Formasi Peunasu berumur Miosen, unit 2 diduga dapat disebandingkan dengan Formasi Seurula & Formasi Julurayeu berumur Pliosen, unit 3 diduga dapat disebandingkan dengan endapan volkanik Toba berumur Plistosen, dan unit 4 diduga dapat disebandingkan dengan aluvial berumur Holosen. Pembagian unit tersebut berdasarkan pada adanya bidang tidakselarasan (onlap), dan pepat erosi (erosional truncation).
Kata kunci : lembar peta 0421, unit seismik, ketidakselarasan.
The results of marine geological investigation of map of sheet 0421 gave a data of seismic and sounding approximately 963.73 kilometers long. Bathymetric map indicates some alignment with the direction of nearly northwest-southeast and presumed to be faults.
Seismic data interpretation indicate that the stratigraphy of the study area can broadly be divided into 4 (four) units those are unit 1; unit 2; unit 3, and unit 4. Correlation balance with regional geology, show that seismic, unit 1 correlates with Peunasu Formation of Miocene, unit 2 correlates with Seurula Formation and Julurayeu Formation of Pliocene, unit 3 correlates with Old Toba volcanic deposites of Pleistocene, and unit 4 correlates with Alluvium of Holocene. The division of seismic units was based on unconformity (onlap) and (erosional truncation).
Keywords: map of sheet 0421, seismic units, unconformity.
20
Kusnida, Dida, e Tommy Naibaho. "LATE NEOGENE SEISMIC STRUCTURES OF THE SOUTH BATANTA BASIN, WEST PAPUA". BULLETIN OF THE MARINE GEOLOGY 29, n. 1 (15 febbraio 2016): 11. http://dx.doi.org/10.32693/bomg.29.1.2014.61.
Testo completoAbstract (sommario):
Study on multi-channel seismic records from South Batanta Basin, West Papua acquired during RV Geomarin III cruise in 2013 were aimed to invent and map geological aspects and for geo-tectonic and geological history studies. Seismic data indicate that sediment sequences which can be observed from our seismic system in the study area are characterized by pre-extension sediments (Lower Early Miocene-Upper Early Pliocene), syn-extension sediments (Lower Middle Pliocene-Upper Late Pliocene), post-extension sediments (Early Pleistocene), and syn-inversion sediments (Late Pleistocene-Recent) typical of the West Papua tectonic system. In the study area, sediment sequences are possibly characterized by clastical sedimentary cover such as slumps, debrites and turbidites.
Key words: South Batanta Basin, seismic sequence, tectonic, faults, clastical sediments.
Studi rekaman seismik multi kanal dari Cekungan Batanta Selatan, Papua Barat yang diperoleh selama pelayaran KR Geomarin III pada tahun 2013 bertujuan untuk menginventarisir dan memetakan aspek-aspek geologi serta untuk studi geo-tektonik dan sejarah geologi. Data seismik menunjukkan bahwa urutan sedimen yang dapat diamati dari sistem seismik di daerah studi ditandai oleh sedimen pra-ekstensi (Miosen Awal Bagian Bawah-Pliosen Awal Bagian Atas), sedimen syn-ekstensi (Pliosen Tengah Bagian Bawah-Pliosen Akhir Bagian Atas), sedimen post-ekstensi (Plestosen Awal), dan sedimen syn-inversi (Pleistosen Akhir-Resen) tipikal sistem tektonik Papua Barat. Di daerah studi, urutan sedimen dicirikan oleh sedimen penutup klastika kemungkinan berupa slump, debrit dan turbidit.
Kata kunci: Cekungan Batanta Selatan, sekuen seismik, tektonik, sesar, sedimen klastika.
21
Witarsa, Jarnal, Dwi Pujiastuti e Elistia Liza Namigo. "Karakterisasi Reservoar Hidrokarbon Menggunakan Atribut Energi dan Metode Seismic Coloured Inversion (SCI) Pada Lapangan Penobscot Kanada". Jurnal Fisika Unand 8, n. 2 (1 aprile 2019): 113–19. http://dx.doi.org/10.25077/jfu.8.2.113-119.2019.
Testo completoAbstract (sommario):
Telah dilakukan karakterisasi reservoar hidrokarbon pada Lapangan Penobscot Kanada menggunakan atribut energi dan metode Seismic Coloured Inversion (SCI) di sepanjang inline 1284 m. Penelitian ini menggunakan data seismik post stack sebagai data input dan data sumur sebagai data kontrol untuk menentukan nilai impedansi akustik (AI). Analisis sensitivitas log yang digunakan menunjukkan bahwa gamma ray log lebih sensitif dalam pemisahan lapisan sand dan shale. Analisis atribut energi dilakukan untuk meningkatkan resolusi vertikal dari penampang seismik untuk menentukan zone of interest. Analisis inversi SCI dilakukan untuk melihat pola sebaran nilai AI pada penampang seismik yang diteliti. Dari hasil inversi SCI terhadap penampang seismik diperoleh nilai AI antara 2,00 x 106 kg/m2s sampai 5,56 x 106 kg/m2s. Hal ini menunjukkan bahwa pada penampang seismik yang diteliti terdapat potensi reservoar hidrokarbon.Kata kunci: atribut energi, Seismic Coloured Inversion (SCI), Acoustic Impedance (AI), Zone Of Interest.
22
Miharno, Fatimah. "ANALISA POTENSI MINYAK DAN GAS BUMI DENGAN ATRIBUT SEISMIK PADA BATUAN KARBONAT LAPANGAN *ZEFARA* CEKUNGAN SUMATRA SELATAN". KURVATEK 1, n. 2 (23 maggio 2017): 21–31. http://dx.doi.org/10.33579/krvtk.v1i2.250.
Testo completoAbstract (sommario):
ABSTRACT*Zefara* Field formation Baturaja on South Sumatra Basin is a reservoir carbonate and prospective gas. Data used in this research were 3D seismik data, well logs, and geological information. According to geological report known that hidrocarbon traps in research area were limestone lithological layer as stratigraphical trap and faulted anticline as structural trap. The study restricted in effort to make a hydrocarbon accumulation and a potential carbonate reservoir area maps with seismic attribute. All of the data used in this study are 3D seismic data set, well-log data and check-shot data. The result of the analysis are compared to the result derived from log data calculation as a control analysis. Hydrocarbon prospect area generated from seismic attribute and are divided into three compartments. The seismic attribute analysis using RMS amplitude method and instantaneous frequency is very effective to determine hydrocarbon accumulation in *Zefara* field, because low amplitude from Baturaja reservoir. Low amplitude hints low AI, determined high porosity and high hydrocarbon contact (HC). Keyword: Baturaja Formation, RMS amplitude seismic attribute, instantaneous frequency seismic attribute
23
Wang, Z. "Seismic Hazard vs. Seismic Risk". Seismological Research Letters 80, n. 5 (1 settembre 2009): 673–74. http://dx.doi.org/10.1785/gssrl.80.5.673.
Testo completo
24
Kuznetsov, S. V. "Seismic waves and seismic barriers". Acoustical Physics 57, n. 3 (maggio 2011): 420–26. http://dx.doi.org/10.1134/s1063771011030109.
Testo completo
25
Okpoli, C. C., e D. I. Arogunyo. "Integration of Well Logs and Seismic Attribute Analysis in Reservoir Identification on PGS Field Onshore Niger Delta, Nigeria". Pakistan Journal of Geology 4, n. 1 (1 giugno 2020): 12–22. http://dx.doi.org/10.2478/pjg-2020-0002.
Testo completoAbstract (sommario):
AbstractIntegrated well dataset and seismics delineated the PGS field onshore Niger Delta for reservoir identification. Gamma ray, resistivity, Neutron and density Logs identified four lithologies: sandstone, shaly sandstone, shaly sand and shale. They consist of sand-shale intercalation with the traces of shale sometimes found within the sand Formation. Petrophysical parameters of the reservoirs showed varying degree of lower density, low gamma ray, high porosity and resistivity response with prolific hydrocarbon reservoir G due to its shale volume and the clean sand mapped as a probable hydrocarbon reservoir. 3D seismic data located both seismic scale and sub-seismic scale structural and stratigraphic elements. Risk reduction in dry hole drilling due fault missing in conventional seismic attribute analysis and interpretation, have to be integrated into the Oil companies standard practice.
26
Rahmat, Rahmat setyo yuliatmoko. "Analisis Seismic GAP Sumatera Menggunakan Anomali Gravitasi". Megasains 11, n. 01 (30 aprile 2020): 24–30. http://dx.doi.org/10.46824/megasains.v11i01.7.
Testo completoAbstract (sommario):
Informasi mengenai keberadaan seismic gap dapat dilakukan dengan beberapa metode, seismic gap sebelumnya merupakan zona aktif gempa namun sekarang tidak adanya aktifitas gempa, hal tersebut menjadi berbahaya karena adanya penimbunan stress, sehingga jika terjadi gempa maka akan bisa dipastikan gempa yang dihasilkan akan cukup besar. Hal tersebut menjadi perhatian yang serius dalam mitigasi gempabumi terutama di daerah yang banyak penduduknya. Penelitian ini bertujuan untuk memetakan zona seismic gap dengan data seismik dan dianalisis dengan data anomali gravitasi. Berdasarkan hasil analisis, Berdasarkan hasil analisis, zona seismic gap berada pada zona transisi anomali gravitasi menengah ke rendah hal ini menandakan perbedaan densitas batuan di daerah transisi tersebut dan adanya punggungan bawah laut sehingga daerah tersebut mengalami locking stress. Gaya tekanan dari lempeng maupun dari aktifitas sesar lokal pada batuan tertahan dalam waktu yang cukup lama, sehingga berpotensi terjadinya gempa besar
27
Iswanto, Eko Rudi, Theo Alvin Riyanto e Hadi Suntoko. "Mikrozonasi di Daerah Plampang, Nusa Tenggara Barat". EKSPLORIUM 42, n. 1 (31 maggio 2021): 39. http://dx.doi.org/10.17146/eksplorium.2021.42.1.6243.
Testo completoAbstract (sommario):
ABSTRAK Provinsi Nusa Tenggara Barat (NTB) merupakan daerah dengan aktivitas kegempaan yang tinggi. Fenomena ini disebabkan oleh adanya aktivitas tektonik sebagai akibat pertemuan Lempeng Eurasia-Australia (zona subduksi) di bagian selatan dan Sesar Flores di bagian utara serta adanya keberadaan sesar-sesar lokal. Terkait dengan rencana pengembangan kawasan Samota di Pulau Sumbawa, NTB, perlu dilakukan suatu kajian kegempaan. Tujuan penelitian ini adalah memetakan indeks kerentanan seismik (Kg) melalui pengukuran mikrotremor dengan analisis menggunakan metode Horizontal to Vertical Spectral Ratio (HVSR). Hasil penelitian berupa peta kerentanan seismik daerah Plampang yang menunjukkan bahwa sisi utara lokasi penelitian memiliki indeks kerentanan seismik rendah yang ditandai dengan nilai amplifikasi kurang dari tiga jika dibandingkan daerah lainnya. Geologi sisi utara lokasi penelitian tersusun oleh batuan gunung api dengan karakteristik batuan keras, ketebalan sedimen sangat tipis, dan tersusun atas batuan Tersier atau lebih tua. Peta kerentanan seismik berguna sebagai acuan dalam mitigasi gempa bumi untuk mengurangi risiko yang ditimbulkan. ABSTRACT Nusa Tenggara Barat (NTB) Province is an area with intense seismic activity. This phenomenon is caused by tectonic activity as the result of the convergency of the Eurasia-Australia Plates (subduction zone) in the south and the Flores Fault in the north as well as the presence of local faults. Regarding the plan to develop the Samota area in Sumbawa Island, NTB, a study concerning earthquakes should be done. The purpose of this study is to map the seismic vulnerability index (Kg) through microtremor measurement by using the Horizontal to Vertical Spectral Ratio (HVSR) analysis method. The result of the study is a seismic vulnerability map of the Plampang area which its northern part has a low seismic vulnerability index indicated by the amplification factor value of less than three compared to other areas. The geology of the northern part of the Plampang area consists of volcanic rocks which has hard rock characteristic, very thin sediment thickness, and composed of Tertiary or older rocks. Seismic vulnerability maps can be useful as a reference for earthquake mitigation to reduce its risks.
28
Dubos-Sallée, Noalwenn, André Fourno, Jeanneth Zarate-Rada, Véronique Gervais, Patrick N. J. Rasolofosaon e Olivier Lerat. "A complete workflow applied on an oil reservoir analogue to evaluate the ability of 4D seismics to anticipate the success of a chemical enhanced oil recovery process". Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 75 (2020): 18. http://dx.doi.org/10.2516/ogst/2020011.
Testo completoAbstract (sommario):
In an Enhanced Oil Recovery (EOR) process, one of the main difficulties is to quickly evaluate if the injected chemical products actually improve oil recovery in the reservoir. The efficiency of the process can be monitored in the vicinity of wells, but it may take time to estimate it globally in the reservoir. The objective of this paper is to investigate the ability of 4D seismics to bridge this gap and to help predict the success or breakdown of a production strategy at reservoir scale. To that purpose, we consider a complete workflow for simulating realistic reservoir exploitation using chemical EOR and 4D seismic modeling. This workflow spans from geological description to seismic monitoring simulation and seismic attributes analysis, through geological and reservoir modeling. It is applied here on a realistic case study derived from an outcrop analog of turbiditic reservoirs, for which the efficiency of chemical EOR by polymer and surfactant injection is demonstrated. For this specific field monitoring application, the impact of both waterflooding and proposed EOR injection is visible on the computed seismics. However, EOR injection induces a more continuous water front that can be clearly visible on seismics. In this case, the EOR efficiency can thus be related to the continuity of the water front as seen on seismics. Nevertheless, in other cases, chemical EOR injections may have more moderate impacts, or the field properties may be less adapted to seismic monitoring. This points out the importance of the proposed workflow to check the relevance of seismic monitoring and to design the most adapted monitoring strategy. Numerous perspectives are proposed at the end of the paper. In particular, experts of the different disciplines involved in the proposed workflow can benefit from the availability of a complete set of well-controlled data of various types to test and improve their own tools. In contrast, the non-experts can easily and quickly benefit from “hands-on” experiments for understanding the involved phenomena. Furthermore, the proposed workflow can be directly applied to geological reservoirs all over the world.
29
Krayenbuehl, Thomas, Nadeem Balushi e Stephane Gesbert. "Novel geometric classification of 3D seismic and its application to the Habshan clinoforms of Western Oman". Leading Edge 40, n. 3 (marzo 2021): 186–92. http://dx.doi.org/10.1190/tle40030186.1.
Testo completoAbstract (sommario):
The principles and benefits of seismic sequence stratigraphy have withstood the test of time, but the application of seismic sequence stratigraphy is still carried out mostly manually. Several tool kits have been developed to semiautomatically extract dense stacks of horizons from seismic data, but they stop short of exploiting the full potential of seismo-stratigraphic models. We introduce novel geometric seismic attributes that associate relative geologic age models with seismic geomorphological models. We propose that a relative sea level curve can be derived from the models. The approach is demonstrated on a case study from the Lower Cretaceous Kahmah Group in the northwestern part of Oman where it helps in sweet-spotting and derisking elusive stratigraphic traps.
30
Trifonov, B. A., S. Yu Milanovsky e V. V. Nesinov. "ESTIMATION OF SEISMIC IMPACTS UNDER CONDITIONS OF PERMAFROST DEGRADATION". Bulletin of Kamchatka Regional Association «Educational-Scientific Center». Earth Sciences, n. 5(56) (26 dicembre 2022): 59–74. http://dx.doi.org/10.31431/1816-5524-2022-4-56-59-74.
Testo completoAbstract (sommario):
Permafrost is widespread in Russia in many mining and oil regions. Some of these areas are located in zones of high seismic activity. In connection with global climate change and possible degradation of permafrost, it is necessary to study the seismic properties of frozen and thawed soils in northern regions, as well as the processes affecting their change. The solution of these problems requires an assessment of the influence of natural factors on the spectral composition and dynamic range of seismic vibrations in the upper layers of the section during earthquakes. The influence of short-term (seasonal thawing-freezing of active layer) factors and long-term (temperature trends) factors on seismic vibrations can be used for predicting changes in seismic conditions in seismically active regions. We present generalization of soils seismic properties and their reflection in the field of elastic wave velocities and oscillation amplitudes. A number of seismo-geocryological models, which can be used for solving engineering-geocryological problems in seismology, are considered. The importance of monitoring the seismic properties of soils during permafrost degradation is emphasized. An approach for estimating seismic hazard based on computational methods of seismic microzoning is proposed.
31
Astawa, Nyoman, Priatin Hadi Widjaja e Wayan Lugra. "POLA SEBARAN GAS CHARGED SEDIMENT DASAR LAUT DI PERAIRAN SIDOARJO JAWA TIMUR". JURNAL GEOLOGI KELAUTAN 9, n. 2 (16 febbraio 2016): 65. http://dx.doi.org/10.32693/jgk.9.2.2011.201.
Testo completoAbstract (sommario):
Gas charged sediment dalam rekaman seismik dicirikan oleh tidak adanya gambar pantul dalam (free reflector), karena gas charged sediment merupakan media penyerap energi. Dari hasil penafsiran rekaman seismik dapat dibuat Peta Pola Sebaran Gas Charged sediment di daerah penelitian. Pola sebaran gas charged sediment di daerah penelitian cukup luas yaitu mulai dari Perairan Sukolilo hingga ke muara Kali Porong. Di bagian selatan daerah penelitian (L-12), sebaran gas charged sediment relatif lebih luas jika dibandingkan dengan di bagian utara (L-19).
Kata kunci : seismik, penafsiran, peta pola sebaran gas charged
In the seismic record gas charged is characterized by free reflectors, because the gas charged is an energy absorber media. From the interpretation of the seismic record, the maps of gas charged distribution pattern in the study area can be created. Gas charged distribution pattern in the study area is extend from Sukolilo Waters to the estuary of Porong River. In the soothern part of the study area (L-12), the distribution of gas charged is relatively broader than in the northern part (L-19).
Keywords: seismic, interpretation, map distribution pattern of biogenic gas
32
Aleshin, M. I., V. G. Gaynanov, M. Yu Tokarev, A. E. Rybalko e D. A. Subetto. "Study of Onega lake Petrozavodsk bay sub-bottom sediments using complex geophysical and geological data analysis". Moscow University Bulletin. Series 4. Geology, n. 4 (28 agosto 2019): 98–104. http://dx.doi.org/10.33623/0579-9406-2019-4-98-104.
Testo completoAbstract (sommario):
This article examines the results of geological interpretation of marine engineering data acquired in Onega lake. The survey included marine seismic acquisition and geological sampling. Seismo-stratigrafic units were picked according to processed seismic data. Survey results allowed to make a seismo-stratigrafic column of quaternary sediments of Onega lake. The column could be used to analyze the structure of open part of the lake as well.
33
Steeghs, Philippe, e Guy Drijkoningen. "Seismic sequence analysis and attribute extraction using quadratic time‐frequency representations". GEOPHYSICS 66, n. 6 (novembre 2001): 1947–59. http://dx.doi.org/10.1190/1.1487136.
Testo completoAbstract (sommario):
The variation of frequency content of a seismic trace with time carries information about the properties of the subsurface reflectivity sequence. As a result, analysis of the data in terms of the local frequency content can provide a worthwhile addition to the standard procedures that are used in seismo‐stratigraphic interpretation. The theory of quadratic time‐frequency representations provides a solid foundation for local frequency analysis of seismic data and seismic attribute extraction. Two applications of the quadratic time‐frequency representations are demonstrated: seismic sequence analysis and seismic attribute extraction. The joint time‐frequency representation of a seismic reflection pattern is often much more easily interpreted in terms of subsurface stratification than the time‐or frequency‐domain description alone. We show how the time‐frequency representation can be used to delineate seismic sequences on the basis of the time‐frequency characteristics of the signal. There exists a close relation between complex‐trace attribute analysis and quadratic time‐frequency representations. In the time‐frequency approach, the seismic attributes are characteristics of the local spectrum. Extraction of the attributes from the time‐frequency representation of the seismic trace leads to considerable improvement of the signal‐to‐noise ratio of the attributes. Furthermore, the classic set of seismic attributes of instantaneous amplitude, phase, and frequency can be easily extended with other parameters describing the local spectrum, such as instantaneous bandwidth, skewness, and kurtosis.
34
Saputra, Elvis. "Pengembangan Peta Spektra Percepatan Peta Kategori Desain Seismik Provinsi Daerah Istimewa Yogyakarta". TERAS JURNAL 13, n. 1 (22 marzo 2023): 61. http://dx.doi.org/10.29103/tj.v13i1.824.
Testo completoAbstract (sommario):
<p class="11daftarpustaka" align="center"><strong>Abstrak</strong></p><p class="11daftarpustaka"> </p><p class="11daftarpustaka">Indonesia dikelilingi oleh empat lempeng besar dunia yang bergerak secara konvergen sehingga menyebabkan sering mengalami kejadian gempa. Salah satu upaya mengurangi risiko bencana gempa adalah melakukan upaya mitigasi seperti pembuatan peta bahaya gempa. Penyusunan Peta Kategori Desain Seismik (KDS) Indonesia saat ini masih terkendala karena keterbatasan data penyelidikan tanah. Meskipun demikian, problem tersebut dapat diatasi dengan melakukan pendekatan berdasarkan data kecepatan gelombang geser pada kedalaman 30 (Vs30) yang disediakan oleh (USGS, 2020). Tujuan dari penelitian ini adalah melakukan penyusunan Peta Kategori Desain Seismik untuk Provinsi Daerah Istimewa Yogyakarta (DIY). Tahapan penelitian diawali dengan pengumpulan data, perhitungan percepatan tanah dan penentuan kategori desain seismik untuk setiap titik dari 3759 titik tinjauan. Hasil penyusunan peta kategori desain seismik Daerah Istimewa Yogyakarta pada kategori risiko I, II, dan III menunjukkan hasil Kabupaten Bantul, Kota Yogyakarta masuk dalam kategori risiko tinggi (KDS D), sedangkan Kabupaten Sleman, Kabupaten Kulonprogo, dan Kabupaten Gunung Kidul masuk dalam kategori risiko sedang hingga tinggi (B, C, dan D). Kategori desain seismik pada kategori risiko IV hampir secara keseluruhan kabupaten-kabupaten di Provinsi Daerah Istimewa Yogyakarta masuk dalam Kategori Desain Seismik D yang artinya memiliki tingkat risiko gempa bumi yang tinggi.</p><p class="11daftarpustaka"> </p><p class="11daftarpustaka">Kata kunci: <em>Gempa</em>, <em>mitigasi,</em><em> kecepatan gelombang geser, kategori desain seismik </em><em></em></p><p class="11daftarpustaka"> </p><p class="11daftarpustaka" align="center"><strong>Abstract</strong></p><p class="11daftarpustaka"> </p><p class="11daftarpustaka">Indonesia is surrounded by four large plates of the world that move convergently, causing frequent earthquakes. One of the efforts to reduce the risk of earthquake disasters is to carry out mitigation efforts such as making earthquake hazard maps. The compilation of Indonesia's Seismic Design Category Map is currently still hampered due to limited soil investigation data. However, this problem can be overcome by making an approach based on the shear wave velocity data (Vs30) provided by (USGS, 2020). The purpose of this research is to create a Seismic Design Category Map for the Province of the Special Region of Yogyakarta. The research phase begins with collecting data, calculating ground acceleration, and determining the seismic design category for each point of the 3759 review points. The compilation result of seismic design category maps for the Special Region of Yogyakarta in risk categories I, II, and III showed that Bantul Regency, Yogyakarta City were in the high risk category (KDS D), while Sleman Regency, Kulonprogo, and Gunung Kidul fall into the moderate to high-risk category (B, C, and D). The Seismic Design Category Map for risk category IV showed that almost all districts in the Special Region of Yogyakarta Province were Seismic Design Category D, which means it has a high level of earthquake risk.</p><p class="11daftarpustaka"> </p><p class="11daftarpustaka">Keywords: <em>Earthquake, mitigation, shear wave velocity, seismic design categories</em><em></em></p><p class="11daftarpustaka"><span lang="IN"><br /></span></p>
35
Polom, U., I. Arsyad e H. J. Kümpel. "Shallow shear-wave reflection seismics in the tsunami struck Krueng Aceh River Basin, Sumatra". Advances in Geosciences 14 (2 gennaio 2008): 135–40. http://dx.doi.org/10.5194/adgeo-14-135-2008.
Testo completoAbstract (sommario):
Abstract. As part of the project "Management of Georisk" (MANGEONAD) of the Federal Institute for Geosciences and Natural Resources (BGR), Hanover, high resolution shallow shear-wave reflection seismics was applied in the Indonesian province Nanggroe Aceh Darussalam, North Sumatra in cooperation with the Government of Indonesia, local counterparts, and the Leibniz Institute for Applied Geosciences, Hanover. The investigations were expected to support classification of earthquake site effects for the reconstruction of buildings and infrastructure as well as for groundwater exploration. The study focussed on the city of Banda Aceh and the surroundings of Aceh Besar. The shear-wave seismic surveys were done parallel to standard geoengineering investigations like cone penetrometer tests to support subsequent site specific statistical calibration. They were also partly supplemented by shallow p-wave seismics for the identification of (a) elastic subsurface parameters and (b) zones with abundance of groundwater. Evaluation of seismic site effects based on shallow reflection seismics has in fact been found to be a highly useful method in Aceh province. In particular, use of a vibratory seismic source was essential for successful application of shear-wave seismics in the city of Banda Aceh and in areas with compacted ground like on farm tracks in the surroundings, presenting mostly agricultural land use areas. We thus were able to explore the mechanical stiffness of the subsurface down to 100 m depth, occasionally even deeper, with remarkably high resolution. The results were transferred into geotechnical site classification in terms of the International Building Code (IBC, 2003). The seismic images give also insights into the history of the basin sedimentation processes of the Krueng Aceh River delta, which is relevant for the exploration of new areas for construction of safe foundations of buildings and for identification of fresh water aquifers in the tsunami flooded region.
36
Onitsuka, Shohei, Hirokuni Ishigaki, Yuichi Koide, Yoshihiro Goto, Norio Kawashima e Tomomi Shiraki. "ICONE19-44058 THE SEISMIC SAFETY MARGIN EVALUATION OF THE BWR SCRAMMABILITY AT SEISMIC EVENTS". Proceedings of the International Conference on Nuclear Engineering (ICONE) 2011.19 (2011): _ICONE1944. http://dx.doi.org/10.1299/jsmeicone.2011.19._icone1944_25.
Testo completo
37
Virieux, Jean, Stéphane Operto, Hafedh Ben-Hadj-Ali, Romain Brossier, Vincent Etienne, Florent Sourbier, Luc Giraud e Azzam Haidar. "Seismic wave modeling for seismic imaging". Leading Edge 28, n. 5 (maggio 2009): 538–44. http://dx.doi.org/10.1190/1.3124928.
Testo completo
38
Subarsyah, Subarsyah, e Sahudin Sahudin. "IDENTIFIKASI SUB-CEKUNGAN DI CEKUNGAN TOMINI BAGIAN SELATAN, BERDASARKAN PENAMPANG SEISMIK 2D DAN ANOMALI GAYA BERAT". JURNAL GEOLOGI KELAUTAN 8, n. 2 (16 febbraio 2016): 95. http://dx.doi.org/10.32693/jgk.8.2.2010.190.
Testo completoAbstract (sommario):
Sub-cekungan di Cekungan Tomini dapat diidentifikasi dari penampang seismik di lintasan 28, 30, 32 dan data anomali gayaberat. Dengan mengkorelasikan kedua data tersebut maka dapat diperlihatkan batas sub cekungan.
Batas tepian cekungan berada pada anomali gaya berat antara 80 sampai -80 mgal. Berdasarkan data seismik ketebalan sedimen di sub cekungan ini relatif menebal ke arah barat, begitu juga dengan luas dari sub cekungan ini yang meluas ke arah barat. Secara umum ketebalan sedimen di sub- cekungan ini lebih tebal dibanding sub cekungan di bagian utara.
Kata Kunci : Sub-cekungan, penampang seismik, anomali gaya berat, Tomini.
Sub-basin in the Basin Tomini can be identified from the seismic section in track 28, 30, 32 and gravity anomaly data. By correlating the data, it can be shown sub-basin boundary.
Limits marginal basin located on the gravity anomaly between 80 to -80 mgal. Based on seismic data in the sub-basin sediment thickness is relatively thick to the west, as well as the extent of this sub-basin that extends to the west. In general, the thickness of sediment in the sub basin is thicker than the sub-basins in the northern part.
Keywords: sub-basin, seismic section, gravity anomaly, Tomini.
39
Zhang, Kuihua, Yarong Wang, Guanlong Zhang, Tao Xu, Wei Xiong, Shengzhu Wang, Ji Ma e Tingbin Sun. "Discovery of Seismites in the Carboniferous Formation of the Shibei Sag (China) and Its Petroleum Geological Significance". Minerals 12, n. 12 (2 dicembre 2022): 1560. http://dx.doi.org/10.3390/min12121560.
Testo completoAbstract (sommario):
To promote oil and gas exploration of the Carboniferous formation in the Shibei sag, the northeastern margin of Junggar Basin, recently drilled rocks from Well ZB6 with typical seismics were characterized. Through systematic core observation, the identification marks of seismites were described, a vertical sequence of seismites was established, and its oil and gas geological significance was analyzed. The results show that the seismites have typical identification marks, such as soft-sediment deformation structures (including five typical marks: liquefied stone vein, liquefied crinkled deformation structure, ball–pillow structure, flame structure and load cast, water release structure and liquefied breccia), brittle fracture structures (including three typical marks: seismic fractures, synsedimentary microfractures and seismic fracture rock) and special rock types, such as seismic grain-supported conglomerates. The stratigraphic succession reconstructed in Well ZB6 was characterized, from base to top, by (1) a basal non-seismic interval; (2) a seismic interval made up of a grain-supported conglomerate level, brittle fracture level, soft-sediment deformation level; and (3) a non-seismic interval. The discovery of seismites has oil and gas geological significance for improving reservoir performance and forming favorable source–reservoir–cap assemblages. The research describes the new reservoir genetic type and exploration direction of the Carboniferous formation in the Shibei sag (China), which has important guiding significance for the next step of oil and gas exploration.
40
Mihai, Andrei, Victorin-Emilian Toader, Iren-Adelina Moldovan e Mircea Radulian. "Exploring the Relationship between Geomagnetic Variations and Seismic Energy Release in Proximity to the Vrancea Seismic Zone". Atmosphere 14, n. 6 (10 giugno 2023): 1005. http://dx.doi.org/10.3390/atmos14061005.
Testo completoAbstract (sommario):
Understanding the seismo–ionospheric coupling mechanism requires a quiet geomagnetic condition, as this represents an ideal situation to detect abnormal variations in the geomagnetic field. In reality, continuous interactions between solar wind and Earth’s magnetosphere create many fluctuations in the geomagnetic field that are more related to sun–magnetosphere interactions than to seismotectonic causes. A triaxial magnetometer was installed at the Muntele Rosu Observatory near the Vrancea seismic zone in 1996 to measure the local magnetic field. Since 2002, the data have become more consistent, allowing for the representation of long time series. Since then, variations have been observed on the eastern component (By) of the magnetic field, which sometimes overlaps with significant earthquakes. Previous studies have shown that high decreases in amplitude recorded on the By component of the magnetic field measured at Muntele Rosu have been accompanied by higher seismicity, while small decreases have been accompanied by lower seismic energy release. This research analyzes the geomagnetic data collected between September 2002 and May 2008 from two geomagnetic observatories, one located in the proximity of the Vrancea seismic zone and another one situated 120 km away. For each geomagnetic anomaly identified, the daily seismic energy released was plotted logarithmically, along with seismicity and Kp indices. Additionally, the daily seismic energy released was also plotted logarithmically for all earthquakes with Mw ≥3. To identify variations in the By component, datasets recorded at Muntele Rosu (MLR) were compared with those recorded at Surlari National Geomagnetic Observatory (SUA), to discriminate between global magnetic variations associated with solar activity and possible seismo–electromagnetic variations. The standard deviation (SDBy) was calculated for each anomaly recorded on the By component of the magnetic field and compared with the cumulative seismic energy release. To determine if this type of variation was present in other components of the magnetic field, the following ratios were calculated for all data recorded at Muntele Rosu: Bz/Bx, Bz/By, and Bz/BH. The size of the anomalies resulting from the standard deviation measured on the By component (SDBy) partially validates the relationship between the size of the anomalies and the seismic energy release during the anomaly. The relationship between the released seismic energy and the anomaly magnitude is vaguely respected, but these variations seem to follow two patterns. One pattern is described by smooth decreases, and the other pattern involves decreases where the By component varies significantly over short periods, generating decreases/increases in steps. It was noticed that seismic activity is greater for the second pattern. Additionally, using standard deviation measured on the magnetic field represents a great tool to discriminate external magnetic field variations from local, possibly seismo–magnetic variations.
41
Czanik, Csenge, Márta Kiszely, Péter Mónus, Bálint Süle e István Bondár. "Identification of Quarry Blasts Aided by Infrasound Data". Pure and Applied Geophysics 178, n. 6 (6 maggio 2021): 2287–300. http://dx.doi.org/10.1007/s00024-021-02748-5.
Testo completoAbstract (sommario):
AbstractWe present our analysis of the detections from the Piszkés-tető, Hungary infrasound array that has been operational since May 2017. We introduce an automatic search method to associate infrasound detections with a preliminary list of explosions detected by the seismic network. Once infrasound detections are associated with seismic events, we relocate the events using both the seismic arrival time and infrasound azimuth observations. We validate our methodology on ground truth events, i.e., explosions confirmed by the mine operators. We demonstrate that seismo-acoustic locations are able to identify the source of explosions even for closely spaced quarries. The discriminative power of the infrasound azimuth is strongest at near-field distances, where local and regional seismic discrimination methods have the most difficulties.
42
Tang, Kun, GuangLi Cheng e Bao Liu. "Seismo-acoustic signal extraction from shallow sea seabed seimic wave field based on F-K method". Journal of Physics: Conference Series 2246, n. 1 (1 aprile 2022): 012023. http://dx.doi.org/10.1088/1742-6596/2246/1/012023.
Testo completoAbstract (sommario):
Abstract Aiming at the numerical simulation of shallow sea seismic wave field, the finite element theory is used to establish the sea water and seabed models respectively, and then the boundary conditions of the sea water and the seabed fluid-solid coupling are constructed according to the fluid-solid coupling theory. This method can be used to quickly predict the shallow sea seismic wave field, based on this method, the vertical displacement of seabed seismic wavefield is carried out. On this basis, adopt F-K(frequency-wavenumber) method, one kind of two-dimesional Fourier transforn, to analyze wave components. Lastly, according to the principle of apparent velocity filtering, the seismo-acoustic signal (Scholte wave) in shallow sea seismic wave field is extracted.
43
Zhang, Hai Yan, Jing Duan e Xiao Mei Chen. "Seismic Behavior Analysis and Seismic Strengthening of Corner Joints without Seismic Details". Advanced Materials Research 163-167 (dicembre 2010): 3972–76. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.3972.
Testo completoAbstract (sommario):
Seismic performance of corner joints without seismic details was analyzed by software ABAQUS, the results indicated that the reinforcement ration of the girders has great effects on the failure process and seismic behavior of corner joints. Beam Haunch Method was used to strengthen these joints, and then finite element analysis was conducted for the joints with unidirectional haunched beam (UHB)and bidirectional haunched beams(BHB). It was found that the bearing capacity of joints was significantly improved but the ultimate displacement and ductility factor were slightly affected by the haunch strengthening. The strengthening effect of bidirectional haunch was obviously superior to that of unidirectional haunch.
44
Astawa, Nyoman, e Wayan Lugra. "GEOLOGI BAWAH PERMUKAAN DASAR LAUT BERDASARKAN PENAFSIRAN REKAMAN SEISMIK PANTUL DANGKAL SALURAN TUNGGAL DI PERAIRAN SELAT SUNDA". JURNAL GEOLOGI KELAUTAN 12, n. 2 (16 febbraio 2016): 103. http://dx.doi.org/10.32693/jgk.12.2.2014.250.
Testo completoAbstract (sommario):
Penelitian ini bertujuan untuk mengetahui kondisi geologi bawah permukaan dasar laut dengan metode seismik pantul dangkal saluran tunggal, dan pemeruman. Seismik stratigrafi daerah penelitian dapat dibedakan menjadi 3 (tiga) unit, yaitu Unit 1 diinterpretasikan sebagai batuan intrusi, Unit 2 yang dekat dengan Pulau Jawa sebagai batuan volkanik dan yang dekat dengan Pulau Sumatera diduga sebagai Formasi Lampung, dan batuan lava andesit, serta Unit 3 diinterpretasikan sebagai sedimen Kuarter. Kedalaman permukaan dasar yang dapat direkam berkisar antara -5 hingga -125 meter dengan perubahan yang terjadi secara bergradasi dari arah pantai ke laut.
Kata kunci : Morfologi permukaan dasar laut, seismik stratigrafi, geologi bawah permukaan, Selat Sunda
The aims of study is to determine the subsurface geology condition of Sunda Strait by using single channel shallow seismic reflection, and the sounding method. Seismic stratigraphy of the study area can be divided into three (3) units, those are Unit 1, interpreted as intrusive rocks, Unit 2, which is close to Java be expected at volcanic rocks and the adjacent of Sumatera island interpreted Lampung Formation and andesitic lava rock, while Unit 3 as suspected Quaternary sediments. The sea floor depth that can be recorded ranging from -5 to -125 metres with the changes depth gradually from the shore to the sea.
Keywords : Seafloor morphology, seismic stratigraphy, subsurface geology, Sunda Strait
45
Subarsyah, Subarsyah, e Tumpal Benhard Nainggolan. "ATENUASI WATER-BOTTOM MULTIPLE DENGAN METODE TRANSFORMASI PARABOLIC RADON". JURNAL GEOLOGI KELAUTAN 12, n. 3 (16 febbraio 2016): 145. http://dx.doi.org/10.32693/jgk.12.3.2014.254.
Testo completoAbstract (sommario):
Interferensi water-bottom multipel terhadap reflektor primer menimbulkan efek bersifat destruktif yang menyebabkan penampang seismik menjadi tidak tepat akibat kehadiran reflektor semu. Teknik demultiple perlu diaplikasikan untuk mengatenuasi multipel. Transformasi parabolic radon merupakan teknik atenuasi multipel dengan metode pemisahan dalam domain radon. Multipel sering teridentifikasi pada penampang seismik. Untuk memperbaiki penampang seismik akan dilakukan dengan metode transformasi parabolic radon. Penerapan metode ini mengakibatkan reflektor multipel melemah dan tereduksi setelah dilakukan muting dalam domain radon terhadap zona multipel. Beberapa reflektor primer juga ikut melemah akibat pemisahan dalam domain radon yang kurang optimal, pemisahan akan optimal membutuhkan distribusi offset yang lebar.
Kata kunci: Parabolic radon, multipel, atenuasi
Water-bottom mutiple interference often destructively interfere with primary reflection that led to incorrect seismic section due to presence apparent reflector. Demultiple techniques need to be applied to attenuate the multiple. Parabolic Radon transform is demultiple attenuation technique that separate multiple and primary in radon domain. Water-bottom mutiple ussualy appear and easly identified on seismic data, parabolic radon transform applied to improve the seismic section. Application of this method to data showing multiple reflectors weakened and reduced after muting multiple zones in the radon domain. Some of the primary reflector also weakened due to bad separation in radon domain, optimal separation will require a wide distribution of offsets.
Keywords: Parabolic radon, multiple, attenuation
46
Suriani, Efa. "KAJIAN STUDI ALTERNATIF DESAIN BANGUNAN TERHADAP BEBAN LATERAL PADA BANGUNAN TINGGI". NALARs 22, n. 1 (9 gennaio 2023): 35. http://dx.doi.org/10.24853/nalars.22.1.35-48.
Testo completoAbstract (sommario):
ABSTRAK. Kondisi tektonik Indonesia terletak pada pertemuan lempeng besar dunia dan kecil, sehingga memberi dampak bahwa wilayah tersebut berpotensi akan sering terjadi gempa. Kota Surabaya dikategorikan sebagai ibukota yang cukup padat, sehingga potensi terjadinya bahaya gempa bumi yang berasal dari sesar Kendeng terbukti aktif serta melakukan pergerakan 5 milimeter per tahun. Menyadari fenomena tersebut merupakan hal yang mutlak sebagai bahan pertimbangan dalam mendisain dan membangun bangunan di wilayah seluruh Indonesia. Sebagai usaha memperkuat pembelajaran terutama pengenalan desain seismik pada mahasiswa Arsitektur, sehingga perlu diteliti prinsip (faktor) yang mempengaruhi desain seismik dengan studi kasus adalah gedung perpustakaan kampus I UINSA, sebagai kajian studi alternatif desain bangunan terhadap ketahanan gedung akibat beban lateral. Metode penelitian adalah deskriptif kuantitatif selanjutnya dianalisis menggunakan software Resist 4,0. Prinsip atau faktor desain seismik yang mempengaruhi pada bangunan bertingkat yaitu, informasi detail konstruksi gedung, rencana lantai (bentuk denah), data seismik (peta wilayah gempa), beban angin, jenis perkuatan struktur dan material yang digunakan baik pada arah X maupun Y, dan informasi terkait konstruksi pondasi. Alternatif pilihan desain seismik terdapat 132 pilihan kombinasi yang dapat digunakan terhadap 12 pilihan jenis perkuatan untuk lateral struktur pada arah X dan Y yang tidak sama masing-masing pada kedua arah tersebut. Pilihan tersebut dapat digunakan pada bangunan studi kasus. Hasil analisis sebagai struktur awal (pembelajaran) yang dapat digunakan oleh mahasiswa Arsitektur maupun Teknik sipil dan hasilnya tidak diperkenankan sebagai hasil desain akhir pada bangunan dilapangan. Kata kunci: beban lateral, gedung bertingkat, desain seismik, tahap awal ABSTRACT. Indonesia's tectonic conditions are located at the confluence of the world's large and small plates, thus giving the impact that the region has the potential for frequent earthquakes. Surabaya is categorized as a relatively dense capital city, so the potential for earthquake hazards from the Kendeng fault is proven active and moves 5 millimeters per year. Realizing this phenomenon is an absolute thing as a material consideration in designing and constructing buildings throughout Indonesia. To strengthen learning, especially the introduction of seismic design to Architecture students, it is necessary to examine the principles (factors) that influence seismic design with a case study of the I UINSA campus library building as an alternative study of building design against building resistance due to lateral loads. The research method is descriptive and quantitative, then analyzed using Resist 4.0 software. Seismic design principles or factors that affect high-rise buildings are detailed information on building construction, floor plans (plan form), seismic data (earthquake area maps), wind loads, types of structural reinforcement, and materials used in both the X and Y directions and information related to foundation construction. Alternative seismic design options 132 combination options can be used against 12 choices of reinforcement types for lateral structures in the X and Y directions, which are not the same in both directions. These options can be used in case study buildings. The results of the analysis as an initial structure (learning) that can be used by students of Architecture and Civil Engineering, and the results are not allowed as the result of the final design of the building in the field. Keywords: lateral load, high rise building, design seismic, preeliminary
47
Blazevic, Lara, Ludovic Bodet, Sylvain Pasquet, Niklas Linde, Damien Jougnot e Laurent Longuevergne. "Time-Lapse Seismic and Electrical Monitoring of the Vadose Zone during a Controlled Infiltration Experiment at the Ploemeur Hydrological Observatory, France". Water 12, n. 5 (25 aprile 2020): 1230. http://dx.doi.org/10.3390/w12051230.
Testo completoAbstract (sommario):
The vadose zone is the main host of surface and subsurface water exchange and has important implications for ecosystems functioning, climate sciences, geotechnical engineering, and water availability issues. Geophysics provides a means for investigating the subsurface in a non-invasive way and at larger spatial scales than conventional hydrological sensors. Time-lapse hydrogeophysical applications are especially useful for monitoring flow and water content dynamics. Largely dominated by electrical and electromagnetic methods, such applications increasingly rely on seismic methods as a complementary approach to describe the structure and behavior of the vadose zone. To further explore the applicability of active seismics to retrieve quantitative information about dynamic processes in near-surface time-lapse settings, we designed a controlled water infiltration experiment at the Ploemeur Hydrological Observatory (France) during which successive periods of infiltration were followed by surface-based seismic and electrical resistivity acquisitions. Water content was monitored throughout the experiment by means of sensors at different depths to relate the derived seismic and electrical properties to water saturation changes. We observe comparable trends in the electrical and seismic responses during the experiment, highlighting the utility of the seismic method to monitor hydrological processes and unsaturated flow. Moreover, petrophysical relationships seem promising in providing quantitative results.
48
OHTAKE, Masakazu. "Seismic Gap, Seismic Quiescence, and Earthquake Forecast". Zisin (Journal of the Seismological Society of Japan. 2nd ser.) 50, appendix (1998): 83–99. http://dx.doi.org/10.4294/zisin1948.50.appendix_83.
Testo completo
49
MAKINO, MINORU, e TADASHI SEIKE. "ON SEISMIC LOADS AND SEISMIC ZONING FACTORS". Journal of Structural and Construction Engineering (Transactions of AIJ) 399 (1989): 65–71. http://dx.doi.org/10.3130/aijsx.399.0_65.
Testo completo
50
Geary, Andrew. "Seismic Soundoff: Exploring land seismic case studies". Leading Edge 40, n. 10 (ottobre 2021): 784. http://dx.doi.org/10.1190/tle40100784.1.
Testo completoAbstract (sommario):
In this episode, Öz Yilmaz discusses his latest book, Land Seismic Case Studies for Near-Surface Modeling and Subsurface Imaging. Written for practicing geophysicists, the book is the culmination of land seismic data acquisition and processing projects conducted by Yilmaz over the last two decades. His expertise and experience are highlighted in detail in this revealing and essential conversation. Hear the full episode at https://seg.org/podcast/post/12564 .