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Littérature scientifique sur le sujet « Seismic area »

Auteur : Grafiati

Publié le 10 mars 2023

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Articles de revues sur le sujet "Seismic area"

Kamiludin, Udaya, I. Nyoman Astawa et 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^o 2 (16 février 2016) : 109. http://dx.doi.org/10.32693/jgk.13.2.2015.266.

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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.

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Iswanto, Eko Rudi, Theo Alvin Riyanto et Hadi Suntoko. « Mikrozonasi di Daerah Plampang, Nusa Tenggara Barat ». EKSPLORIUM 42, n^o 1 (31 mai 2021) : 39. http://dx.doi.org/10.17146/eksplorium.2021.42.1.6243.

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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.

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Miharno, Fatimah. « ANALISA POTENSI MINYAK DAN GAS BUMI DENGAN ATRIBUT SEISMIK PADA BATUAN KARBONAT LAPANGAN *ZEFARA* CEKUNGAN SUMATRA SELATAN ». KURVATEK 1, n^o 2 (23 mai 2017) : 21–31. http://dx.doi.org/10.33579/krvtk.v1i2.250.

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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

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Lizurek, Grzegorz, Jan Wiszniowski, N. V. Giang, D. Q. Van, L. V. Dung, V. D. Tung et Beata Plesiewicz. « Background seismicity and seismic monitoring in the Lai Chau reservoir area ». Journal of Seismology 23, n^o 6 (25 octobre 2019) : 1373–90. http://dx.doi.org/10.1007/s10950-019-09875-6.

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Abstract Reservoir-triggered seismic activity depends not only on the technical characteristics of the future reservoir (filling volume, the height of water column) but also on the seismo-tectonics and the natural seismic processes occurring in the area before construction of an artificial reservoir. Passive seismic monitoring was realised near Lai Chau (Vietnam) before the impoundment started. It allowed exploration of the natural seismicity in the area of the future dam. Locations of seismic events several months prior to the reservoir impoundment were observed with ten stations installed in the reservoir vicinity. Events were mainly located near the dam along the Da river headwaters fault. However, only four stations were available for the entire period before the impoundment. Despite the network limitations, completeness of seismic catalogue and b value were determined and may be used as a baseline for analysis of the seismicity in this area after impoundment. The magnitude completeness level is significantly smaller than in the broader seismogenic zones covering an area of the dam. The b value differs from the results obtained for regional seismicity of Northeastern Vietnam. The capability of the local network for moment tensor inversion was estimated with the use of synthetic data tests. Test results provided the requirements for the station number according to azimuthal coverage of the network to obtain the reliable full moment tensor (MT) solution. Preliminary analysis of the seismic activity after Lai Chau reservoir impoundment indicates some changes in activity related to the impoundment and reservoir exploitation.

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Drogreshka, Katerina, Dragana Chernih et Jasmina Najdovska. « SEISMICITY OF DEBAR EPICENTRAL AREA ». Knowledge International Journal 28, n^o 4 (10 décembre 2018) : 1245–50. http://dx.doi.org/10.35120/kij28041245k.

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Main neotectonic regions in the territory of the Republic of Macedonia are the Vardar zone, West Macedonia and East Macedonia. These regions, being developed within major, regional tectonic units, are permanently uplifting with different intensities. They also show differences in the seismic activity, which is the reason to treat them as separate seismic zones, named with the same names. Debar epicentral area belongs to the West Macedonia seismic zone. This epicentral area is presented by the sinking of Drim graben (valley), crisscrossed by neotectonic faults which coused strong earthquake in 1967y, with Richter magnitude ML=6.5 and intensity Io=IX degrees EMS–1998 scale. After 1900y several moderate (5.0≤ML≤5.9) and light (4.0≤ML≤4.9) and lot of small earthquakes with magnitude ML ≤3.9 are also observed. According to all instrumental data, our latest investigation of seismic activity parameters for this epicentral area pointed out the activity of Elbasan-Debar fault.

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Angove, Ron. « THE POINT TORMENT SEISMIC SURVEY : A SEMI-PORTABLE SEISMIC OPERATION ». APPEA Journal 25, n^o 1 (1985) : 248. http://dx.doi.org/10.1071/aj84021.

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Point Torment, an area of low-lying tidal mudflats and adjacent coastal peninsula, was the site of a seismic survey unique to Australian geophysical exploration. This survey was conducted by Esso Australia Ltd and the area, part of EP 104, is located north of the township of Derby in Western Australia.Surface conditions in the area varied from thickly wooded grassland on the peninsula to open mudflats. Vehicle access to the mudflats was severely restricted and helicopter support was necessary to maintain the seismic operation throughout. The operation was extremely labour intensive; for example, line-cutting through mangrove areas was carried out by hand.Seismic recording was achieved using an OPSEIS* 5500 digital radio telemetry system. With this system data is collected by portable field units labelled Remote Telemetry Units (RTU's) and subsequently retrieved by Radio telemetry and permanently stored on magnetic tape by a Central Recording Station (CRS). This was the first instance of this system being employed in Australia.

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Astawa, Nyoman, Priatin Hadi Widjaja et Wayan Lugra. « POLA SEBARAN GAS CHARGED SEDIMENT DASAR LAUT DI PERAIRAN SIDOARJO JAWA TIMUR ». JURNAL GEOLOGI KELAUTAN 9, n^o 2 (16 février 2016) : 65. http://dx.doi.org/10.32693/jgk.9.2.2011.201.

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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

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Woo, Gordon. « Seismic area zones : myth or reality ? » Terra Nova 6, n^o 5 (septembre 1994) : 535–36. http://dx.doi.org/10.1111/j.1365-3121.1994.tb00897.x.

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Xie, Zhuo Juan, et Yue Jun Lu. « Determination of the Spatial Distribution Function of Bohai Seismic Tectonic Area ». Advanced Materials Research 1065-1069 (décembre 2014) : 1530–34. http://dx.doi.org/10.4028/www.scientific.net/amr.1065-1069.1530.

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The spatial distribution function assigns seismicity parameters of seismic zone and belt to the potential earthquake source area seismic by the magnitude interval, determination of the spatial distribution function is one of the key technologies to comprehensive probabilistic seismic hazard analysis methods, and the results will directly influence seismic hazard analysis results of the calculated sites. However, the spatial distribution functions are hard to get by statistics due to serious lack of seismic samples, and evaluation factors used in the actual work are too complex and not independent, the spatial distribution function is lack of reliability. In this paper, Bohai seismic tectonic area is chosen as an example; geological data are obtained from the newly built offshore oil platform engineering in recent decades, while seismic activity data are obtained by checking from historical difficult seismic parameters. Five factors are adopted in this area, including potential seismic focus area, seismic tectonic, seismic activity level, long-term forecasts, and strong earthquake recurrence interval and construct empty segment. Spatial distribution function of Bohai Sea earthquake structure area is obtained by weighted comprehension; it reflects the spatial and temporal heterogeneity of seismic activities in the area, and provides the calculation parameters for the probabilistic seismic hazard analysis.

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Suarez, Gabriela. « Designing 3D seismic surveys in the Macal area using seismic modeling ». Leading Edge 23, n^o 10 (octobre 2004) : 1071–76. http://dx.doi.org/10.1190/1.1813361.

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Thèses sur le sujet "Seismic area"

Liang, Jonathan Zhongyuan. « Seismic risk analysis of Perth metropolitan area ». University of Western Australia. School of Civil and Resource Engineering, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0142.

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[Truncated abstract] Perth is the capital city of Western Australia (WA) and the home of more than three quarters of the population in the state. It is located in the southwest WA (SWWA), a low to moderate seismic region but the seismically most active region in Australia. The 1968 ML6.9 Meckering earthquake, which was about 130 km from the Perth Metropolitan Area (PMA), caused only minor to moderate damage in PMA. With the rapid increase in population in PMA, compared to 1968, many new structures including some high-rise buildings have been constructed in PMA. Moreover, increased seismic activities and a few strong ground motions have been recorded in the SWWA. Therefore it is necessary to evaluate the seismic risk of PMA under the current conditions. This thesis presents results from a comprehensive study of seismic risk of PMA. This includes development of ground motion attenuation relations, ground motion time history simulation, site characterization and response analysis, and structural response analysis. As only a very limited number of earthquake strong ground motion records are available in SWWA, it is difficult to derive a reliable and unbiased strong ground motion attenuation model based on these data. To overcome this, in this study a combined approach is used to simulate ground motions. First, the stochastic approach is used to simulate ground motion time histories at various epicentral distances from small earthquake events. Then, the Green's function method, with the stochastically simulated time histories as input, is used to generate large event ground motion time histories. Comparing the Fourier spectra of the simulated motions with the recorded motions of a ML6.2 event in Cadoux in June 1979 and a ML5.5 event in Meckering in January 1990, provides good evidence in support of this method. This approach is then used to simulate a series of ground motion time histories from earthquakes of varying magnitudes and distances. ... The responses of three typical Perth structures, namely a masonry house, a middle-rise reinforced concrete frame structure, and a high-rise building of reinforced concrete frame with core wall on various soil sites subjected to the predicted earthquake ground motions of different return periods are calculated. Numerical results indicate that the one-storey unreinforced masonry wall (UMW) building is unlikely to be damaged when subjected to the 475-year return period earthquake ground motion. However, it will suffer slight damage during the 2475-return period earthquake ground motion at some sites. The six-storey RC frame with masonry infill wall is also safe under the 475-year return period ground motion. However, the infill masonry wall will suffer severe damage under the 2475-year return period earthquake ground motion at some sites. The 34-storey RC frame with core wall will not experience any damage to the 475-year return period ground motion. The building will, however, suffer light to moderate damage during the 2475-year return period ground motion, but it might not be life threatening.

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Milluzzo, Vincenzo. « Seismic chacterization of Vulcano island and Aeolian area by tectonic and seismo-volcanic events ». Doctoral thesis, Università di Catania, 2013. http://hdl.handle.net/10761/1330.

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We investigated the relationship between seismo-volcanic events, recorded at La Fossa crater of Vulcano (Aeolian Islands, Italy) during 2004-2009, and the dynamics of the hydrothermal system. During the period of study, six episodes of increasing numbers of seismo-volcanic events took place at the same time as geothermal and geochemical anomalies were observed. These geothermal and geochemical anomalies have been interpreted as resulting from an increasing deep magmatic component of the hydrothermal fluids. Four classes of seismic events (long period, high frequency, monochromatic and tornillos events), characterised by different spectral content and various similarity of the waveforms, have been recognised. These events, clustered mainly below La Fossa crater area at depths of 0.5 1.1 km b.s.l., were space-distributed according to the classes. Based on their features, we can infer that such events at Vulcano are related to two different source mechanisms: (1) fracturing processes of rocks and (2) resonance of cracks (or conduits) filled with hydrothermal fluid. In the light of these source mechanisms, the increase in the number of events, at the same time as geochemical and geothermal anomalies were observed, was interpreted as the result of an increasing magmatic component of the hydrothermal fluids, implying an increase of their flux. Indeed, such variation caused an increase of both the pore pressure within the rocks of the volcanic system and the amount of ascending fluids. Increased pore pressures gave rise to fracturing processes, while the increased fluid flux favoured resonance and vibration processes in cracks and conduits. Finally, a gradual temporal variation of the waveform of the hybrid events (one of the subclasses of long period events) was observed, likely caused by heating and drying of the hydrothermal system. After careful analysis of the seismo-volcanic events of the Aeolian Islands area, the attention was paid to the tectonic events, in order to find possible relationships with the volcanic activity in the area. The aim of this part of the thesis was to identify spatial clusters of earthquakes, locate active seismogenic zone and their relationships with the volcanic activity in the Aeolian Islands. High precision locations were performed in the present thesis, by applying the concept of the velocity model-hypocentres joint inversion and earthquake relocations, along with an analysis of the fault plane solutions. In order to improve our knowledge on the active seismo-tectonics areas we exploited a dataset encompassing 351 events recorded during a 17 year period (1993-2010). Overall, our results show that part of the seismicity is clustered along active seismogenic structures that concur with the main regional tectonic trends whose activity furnishes new elements to better understand the dynamics of the area. A cluster of 24 events in the northern part of Vulcano, NE-SW oriented, marks the presence of a structure that seems to play a key role in magma uprising at Vulcano. These earthquakes suggest the existence of a seismogenic structure (passing just below Vulcanello), which could be interpreted as a discontinuity linking the two magma accumulation zones, thereby representing a possible preferential pathway along which magma may intrude as well as being responsible for fluid migration toward the surface. The results presented in this thesis suggest that the comparison of seismic, ground deformation and temperature data can be useful for better understanding the dynamics of a complex volcano-hydrothermal system, including a better definition of the origin of a volcano unrest, and hence for improving the estimation of the level of the local volcanic hazard.

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Miao, Xiao Gui. « Integrated seismic study of the Sudbury structure and surrounding area ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1995. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23640.pdf.

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Stoch, Agnieszka. « Analysis of Seismic Data Acquired in the Hverahlíð Geothermal Area ». Thesis, Uppsala universitet, Geofysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-413199.

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Volcanic rifting environments, such as in Iceland, are challenging for conventional seismic reflection methods using active surface seismic sources. This study demonstrates the potential of a novel technique, called Virtual Reflection Seismic Profiling (VRSP) for imaging reflections in geothermal regions, like Hverahlíð, where a dense seismic array recorded a number of local microearthquakes for cross-correlation. Uppsala University, in collaboration with Reykjavik Energy, recorded seismicity in Hverahlíð using both seismometers and geophones. Acquired data were processed using the VRSP method, which applies seismic interferometry only to selected events, in this thesis local microearthquakes. Cross-correlation of the signal from a microearthquake recorded at one of the stations, which acts as a virtual source, with a ghost reflection recorded by the remaining receivers, produces a virtual shot gather. Stacking each station’s result, for all available events, and following a conventional multichannel processing sequence resulted in two stacked seismic images. Potential reflections observed in the obtained sections could be associated with major feed zones identified in the area by the borehole measurements. Eight dynamite explosions were processed with a conventional seismic reflection method, as a complementary source to the microearthquakes. In the produced stacked seismic section two potential reflections could be observed. Results from both passive and active datasets were 3D visualised to verify whether the reflections correspond to each other between sections. Two horizons were traced throughout all three stacked sections. One more interface appeared on two images obtained from processing the passive data. This study shows promising results for using natural sources to image the subsurface in a challenging environment.

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Abdelrahman, Wedissa. « Reprocessing of reflection seismic data from the Skåne area, southern Sweden ». Thesis, Uppsala universitet, Geofysik, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-183607.

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Seismic reflection surveying is a powerful method to explore the structures of the Earth’s crust and describe it is layers. It is also used extensively in the oil industry. Offshore seismic profiles were acquired in southern Sweden (Skane area) for petroleum exploration purposes, but no productive fields were discovered in that area. The seismic reflection data were collected and processed in the 1970s. The purpose of this thesis is to reprocess some of the seismic profiles from the 1970s with new processing programs to improve the results and compare it with the previous results. Offshore lines 208, 206, 212 have been selected in this project because they cross each other and are close to a borehole with sonic data. The borehole lies close to lines 208 and 212 as seen from the Skane area map. Also this report can be used to introduce the reader to fundamentals of seismic data processing. The processing was done using Claritas software by applying standard processing steps to produce migrated stacked sections for every line as a final product.

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Allen, G. F. « Interval velocities from moveout velocities over a seismic reflection survey area ». Thesis, University of Leicester, 1985. http://hdl.handle.net/2381/33751.

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Moveout velocities sampled frequently along seismic horizons on a selection of seismic lines are used to derive interval velocities in an 'inversion' algorithm developed from work published by Hubral. This inversion is based on zero-offset raytrace modelling in a simplistic local ground model. The 'Hubral algorithm' is incorporated into a database which allows spatial smoothing of velocities. The spatial consistency of derived interval velocities can then be assessed by reference to mis-ties at line intersections, while interval velocities from well data can be used to check their validity. These principles have been used to derive interval velocities both from real data and from 'synthetic' data generated by common mid-point raytracing over schematic ground models. The latter study reveals that the procedure performs well if the local subsurface sampled by the CMP gather conforms approximately to the simplistic ground model assumed by the Hubral algorithm. The method is unsuitable in areas of faulting and interval velocity heterogeneity, and may yield spurious results over fold axes. Application of the procedure to real data indicates that it is generally desirable to smooth both moveout velocities before inversion and interval velocities after inversion. Comparison with well information shows that interval velocities derived by the Hubral algorithm are consistently higher than those measured from calibrated velocity logs. This observation is disturbing, since the derived interval velocities require a correction if they are to be used for depth conversions, but the discrepancy cannot be explained by ray theoretical considerations. No advantage appears to be gained by the 'layer-by-layer' mode of inversion over the 'direct' inversion, despite the greater potential for error propagation anticipated in the latter. Further work on different data sets is required to justify general use of the layer-by-layer mode of inversion.

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Ribeiro, Tiago Daniel Machado Pinto. « Multichannel seismic investigation of the Gran Burato area, off W Galicia ». Master's thesis, Universidade de Aveiro, 2011. http://hdl.handle.net/10773/7509.

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Mestrado em Engenharia Geológica
The study of offshore gas accumulation has been a key-topic over the last decades due to the importance of hydrocarbon exploration and production. The presence of free gas or gas accumulations in the sediments can also indicate hydrocarbon reservoirs in depth. This work presents the results of a geophysical survey in the Western continental Galicia margin in the scope of a research project to investigate a giant pockmark discovered in this margin, known as the Gran Burato. The main objectives of this work were the detailed re-processing and interpretation of the multichannel seismic data acquired during the BURATO4240 survey. The preliminary processing carried out onboard during the cruise was improved in the scope of this work, with a more detailed processing (detailed velocity analysis and pre-stack time migration of selected seismic lines), to better image the deeper part of the seismic sections. The application of advanced processing techniques allowed the improvement of the onboard seismic processing, in particular, the imaging of the faults and the deeper part of the seismic sections, which helped the seismic interpretation work. In this thesis, the preliminary seismic interpretation was revised, improved, the main faults were mapped, and time and depth structural and horizon maps for the main interpreted seismic stratigraphic units were produced. A preliminary structural map of the study area was obtained, which contributes to a better knowledge about the possible formation of the Gran Burato, and the underlying geology. The origin of the Gran Burato seems to be related to episodes of massive expulsions of gas which lifted the overlying sediments into the water, which then were drifted away by the currents, and created this outstanding structure. This gas probably migrated to the upper stratigraphic sequences through the extensive faults, where it was accumulated. A preliminary interpretation of possible evidences of fluids (most likely gas) accumulations and leakage were performed, and several amplitudes anomalies were identified. The weaker evidences of gas or other fluids around the Gran Burato seem to support the idea that the majority of the gas has already escaped, probably during the formation of this giant pockmark. However, possible evidences of gas accumulations were identified in areas farther away. New multichannel seismic data acquired last August in the same area, will permit to confirm better some hypothesis rose in this work, and will certainly represent a solid base to support this investigation work.
O estudo de acumulações de gás offshore tem sido um tópico chave ao longo das últimas décadas, devido à importância da produção e exploração de hidrocarbonetos. A presença de gás livre ou acumulações de gás nos sedimentos pode indicar a presença de reservatórios de hidrocarbonetos em profundidade. Este trabalho apresenta os resultados de uma campanha geofísica realizada na margem continental Oeste da Galiza, no âmbito de um projecto de investigação para estudar um pockmark gigante descoberto nesta margem, conhecido como Gran Burato. Os principais objectivos deste trabalho foram o re-processamento e interpretação dos dados sísmicos multicanal, adquiridos na campanha BURATO4240. O processamento sísmico preliminar realizado durante a campanha de aquisição foi melhorado no âmbito deste trabalho, com um fluxo de processamento mais pormenorizado (análise de velocidades detalhada e migração pré-stack em tempo dos perfis mais representativos), de modo a permitir uma melhor visualização da parte mais profunda dos perfis sísmicos. A aplicação de técnicas de processamento utilizadas na indústria melhorou a qualidade do processamento preliminar, em particular, a resolução das falhas e as partes mais profundas das secções sísmicas, o que foi essencial para a interpretação sísmica. No âmbito desta tese, a interpretação sísmica preliminar foi detalhada e melhorada, as falhas principais foram espacialmente correlacionadas, e mapas estruturais e dos horizontes interpretados foram criados em tempo e em profundidade. Foi construído um mapa estrutural preliminar para a área de estudo, o que permite um conhecimento integrado sobre possíveis mecanismos de formação do Gran Burato, e também sobre a estrutura geológica observada nesta região. A origem do Gran Burato parece estar relacionada com vários episódios de expulsão massiva de gás que remobilizaram os sedimentos, dando origem a esta impressionante estrutura. Este gás terá provavelmente migrado através de falhas para as unidades sedimentares mais superficiais, onde foi acumulado. Uma interpretação preliminar de possíveis evidências de escape e acumulações de fluidos (provavelmente gás) foi realizada, e várias anomalias de amplitudes foram identificadas. As fracas evidências de gás na zona do Gran Burato, aparentam suportar a ideia de que a maioria do gás nesta zona já terá escapado, provavelmente durante a formação desta estrutura. Contudo, possíveis evidências de gás foram detectadas em áreas vizinhas.

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Ozturk, Mehmet Selim. « Effects Of Masonry Infill Walls On The Seismic Performance Of Buildings ». Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606753/index.pdf.

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In Turkey, in most of the reinforced concrete buildings, hallow masonry infill walls are used as a non-structural element, during design stage, their contribution to overall building behavior is not well known. Observations made after the earthquakes revealed that these non-structural elements had beneficial effects on the lateral capacity of the building. In this study, the contribution of the hallow masonry infill walls to the lateral behavior of reinforced concrete buildings was investigated. For this purpose, two different buildings were chosen as case studies. Three and six story symmetric buildings are modeled as bare and infilled frames. The parameters that were investigated are column area, infill wall area, distribution of masonry infill walls throughout the story. To determine the effect of each parameter, global drift ratios are computed and are compared for each case.

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Martin, Jake Joseph. « Geophysical and geological analysis of fault activity and seismic history of the Obion River Area, New Madrid Seismic Zone (NMSZ), Western Tennessee, USA ». Thesis, Boston College, 2014. http://hdl.handle.net/2345/bc-ir:103595.

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Thesis advisor: John Ebel
The New Madrid Seismic Zone (NMSZ) is well known for producing some of the largest intra-cratonic earthquakes within the North American Plate. The common hypothesis for the geological structure within the NMSZ is that stress is released across three major faults: the Cottonwood Grove Fault, the New Madrid North Fault, and the Reelfoot Thrust Fault. Evidence exists that would suggest an alternative model of geologic deformation in the area: that stress is being released across more than these three faults. A geologic and geophysical investigation was done to investigate a hypothetical fault west of Dyersburg, TN to test the alternative multi-fault hypothesis. A seismically created sand blow was logged in close proximity to the fault projection. Weathering of the sand blow indicated that the age of the sand blow came from a seismic event prior to the 1811-1812 earthquakes. There was no evidence to confirm this sand blow was created by a hypothetical fault in close proximity. A seismic exploration of the area was done across four seismic lines, primarily mapping Quaternary-age Mississippi River flood plain deposits. These seismic surveys yielded no evidence to suggest the presence of an additional fault. Across all surveys no evidence was found to conclusively support any existing theory on fault movement in the NMSZ
Thesis (MS) — Boston College, 2014
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Earth and Environmental Sciences

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Nicolosi, Massimo. « Seismic analysis of inclined shallow granular deposits ». Doctoral thesis, Università di Catania, 2012. http://hdl.handle.net/10761/1158.

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In the last decades many attempts for understanding the cyclic and dynamic behaviour of soft soils have been devoted by the scientific community. The aim of this thesis consists to investigate the mechanical response of two granular material (Hostun and Toyoura sand) in cyclic/dynamic conditions. In this paper some relationships between permanent displacement, evaluated by means of the code VIBRAZIONE and the Newmark method, and earthquake parameters, such as critical acceleration ratio, Arias Intensity and Destructive Power, have been investigated.

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Livres sur le sujet "Seismic area"

Rao, N. Purnachandra. Seismic microzonation of Jabalpur urban area. Bangalore : Geological Society of India, 2012.

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R, Foulger G., et Geological Survey (U.S.), dir. A microearthquake survey of the Mammoth Mountain area, Long Valley Caldera, California, summer 1997. [Menlo Park, Calif.] : U.S. Dept. of the Interior, U.S. Geological Survey, 1998.

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Corporation, Bechtel Infrastructure, Howard, Needles, Tammen & Bergendoff. et San Francisco Bay Area Rapid Transit District (Calif.), dir. BART seismic vulnerability study. [Oakland, CA ? : San Francisco Bay Area Rapid Transit District?, 2002.

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J, Moses Michael, et Geological Survey (U.S.), dir. Onshore-offshore wide-angle seismic recordings of the San Francisco Bay Area Seismic Imaging Experiment (BASIX) : The five-day recorder data. Menlo Park, Calif : U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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Brocher, Thomas Mark. Onshore-offshore wide-angle seismic recordings of the San Francisco Bay Area Seismic Imaging Experiment (BASIX) : The five-day recorder data. Menlo Park, Calif : U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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Brocher, Thomas M. Onshore-offshore wide-angle seismic recordings of the San Francisco Bay Area Seismic Imaging Experiment (BASIX) : The five-day recorder data. Menlo Park, Calif : U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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Brocher, Thomas Mark. Onshore-offshore wide-angle seismic recordings of the San Francisco Bay Area Seismic Imaging Experiment (BASIX) : Data from the Northern California Seismic Network. Menlo Park, Ca : U.S. Dept. of the Interior, U.S. Geological Survey, 1994.

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C, Pope Daniel, et Geological Survey (U.S.), dir. Onshore-offshore wide-angle seismic recordings of the San Francisco Bay Area Seismic Imaging Experiment (BASIX) : Data from the Northern California Seismic Network. Menlo Park, Ca : U.S. Dept. of the Interior, U.S. Geological Survey, 1994.

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C, Pope Daniel, dir. Onshore-offshore wide-angle seismic recordings of the San Francisco Bay Area Seismic Imaging Experiment (BASIX) : Data from the Northern California Seismic Network. Menlo Park, Ca : U.S. Dept. of the Interior, U.S. Geological Survey, 1994.

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Chapitres de livres sur le sujet "Seismic area"

Yuliang, Hu, Liu Zuyuan, Yang Qingyuan, Chen Xiancheng, Hu Ping, Ma Wentao et Lei Jun. « Induced Seismicity at Wujiangdu Reservoir, China : A Case Induced in the Karst Area ». Dans Induced Seismic Events, 409–18. Basel : Birkhäuser Basel, 1996. http://dx.doi.org/10.1007/978-3-0348-9204-9_15.

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Liégeois, Robert M. G. L. « Geological and Mining Aspects of The Liège Area ». Dans Seismic Activity in Western Europe, 347–68. Dordrecht : Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5273-7_29.

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Hurtado, Jorge E. Alva. « Seismic Safety of the Lima Metropolitan Area ». Dans Issues in Urban Earthquake Risk, 251–64. Dordrecht : Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-015-8338-1_17.

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Glazer, S. N. « Status of the Networks in the Klerksdorp Area, June 1997 ». Dans Mine Seismology : Seismic Warning Concept, 145–66. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62353-5_5.

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Thoenes, P. D., C. R. Golightly et J. J. A. Hartevelt. « Site assessment for a LNG plant in a faulted and seismically active karstic limestone area ». Dans European Seismic Design Practice, 75–81. London : Routledge, 2022. http://dx.doi.org/10.1201/9780203756492-12.

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Kaláb, Zdeněk, et Jaromír Knejzlík. « Evaluation of Seismic Effects Generated by Mining Induced Seismic Events in Stonava Area ». Dans Geophysics in Mining and Environmental Protection, 1–9. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19097-1_1.

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Zuo, Kezhen, Cuiping Zhao, Haijiang Zhang et Xiaodong Zhang. « Three-Dimensional Crustal Structure and Seismicity Characteristics of Changning-Xingwen Area in the Southwestern Sichuan Basin, China ». Dans China Seismic Experimental Site, 147–69. Singapore : Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-8607-8_8.

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Bikkeni, S. K., E. G. Zhiltsov, M. Kh Livshitz, N. A. Nikonova, A. A. Suvorov et Yu A. Treskova. « Deep Seismic Sounding in the Vicinity of Sakhalin ». Dans The Crust and Upper Mantle of the Pacific Area, 140–46. Washington, D. C. : American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm012p0140.

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Ewing, John, Maurice Ewing, Thomas Aitken et William J. Ludwig. « North Pacific Sediment Layers Measured by Seismic Profiling ». Dans The Crust and Upper Mantle of the Pacific Area, 147–73. Washington, D. C. : American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm012p0147.

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Abdullah, Nurul Huda, et Haryati Awang. « Seismic Refraction Investigation on Limestone Area in Gopeng, Perak ». Dans InCIEC 2015, 275–86. Singapore : Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-0155-0_26.

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Actes de conférences sur le sujet "Seismic area"

Tataru, Dragos. « CHARACTERIZATION OF SEISMIC SOURCES USING LARGE SEISMIC DATASETS - GALATI PILOT AREA ». Dans 16th International Multidisciplinary Scientific GeoConference SGEM2016. Stef92 Technology, 2016. http://dx.doi.org/10.5593/sgem2016/b13/s05.052.

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Castelli, F., V. Lentini et M. Maugeri. « Stability Analysis of Landfills in Seismic Area ». Dans Geo-Congress 2013. Reston, VA : American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784412787.124.

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Cacciola, P., N. Maugeri, G. Muscolino, Adolfo Santini et Nicola Moraci. « Stochastic seismic analysis in the Messina strait area ». Dans 2008 SEISMIC ENGINEERING CONFERENCE : Commemorating the 1908 Messina and Reggio Calabria Earthquake. AIP, 2008. http://dx.doi.org/10.1063/1.2963816.

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Weir-Jones, I., P. M. Duncan, Ph D., S. A. Shore et S. M. J. Taylor. « Recent Experience of System Optimization for Wide Area PMM Installations ». Dans First EAGE Passive Seismic Workshop - Exploration and Monitoring Applications. European Association of Geoscientists & Engineers, 2006. http://dx.doi.org/10.3997/2214-4609.201402593.

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Xuming, Bai, Wang Ruizhen, Li Haidong, Yuan Shenghui, Cui Hongliang, Wei Yibing et Cheng Zhanzhan. « Application of seismic exploration in Xiong'an New area ». Dans SEG 2019 Workshop : Geophysics for Smart City Development, Beijing, China, 29-31 July 2019. Society of Exploration Geophysicists, 2019. http://dx.doi.org/10.1190/smct-2019-02.1.

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Fujikura, Shuichi, Yuji Sakakibara, Minh Hai Nguyen et Akinori Nakajima. « Seismic Behavior of Curved Bridge in Mountain Area ». Dans IABSE Congress, New York, New York 2019 : The Evolving Metropolis. Zurich, Switzerland : International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.2048.

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<p>The 2016 Kumamoto Earthquake occurred in central Kyushu, Japan, on April 14th with Mw 6.2 followed by the Mw 7.0 mainshock on April 16th. These earthquakes were mainly caused by the Futagawa fault and Hinagu fault where surface ruptures extended about 34 km long. Some of the bridges located in mountain area and close to the fault were damaged due to these near‐field earthquakes. Oginosaka Bridge is one of them and is a horizontally curved bridge with longitudinal and transverse slope, which is a feature of the bridges located in mountain area. The superstructure was rotated on plan and displaced transversely at both abutments to the opposite side, and there was an evidence of the deck‐abutment pounding in longitudinal direction. In order to investigate the seismic behavior of the curved bridge, nonlinear time‐history analyses including a deck‐abutment pounding interaction were carried out. The deck‐abutment pounding interaction considered in the analyses could capture the post‐impact response of the superstructure. The near‐field ground motions were used for the analyses. The analytical results showed that the curved bridge is susceptible to the deck rotation caused by pounding in longitudinal direction at the deck end under earthquake loading.</p>

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Yang, Juyong, Youjun Xiao et Gengxin Peng. « Application of well‐driven seismic in tazhong area ». Dans Beijing 2009 International Geophysical Conference and Exposition. Society of Exploration Geophysicists, 2009. http://dx.doi.org/10.1190/1.3603619.

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Daniels, J., J. Dangerfield, P. Riste, M. Skaug et V. Haugen. « Ocean Bottom Seismic in the Oseberg South Area ». Dans 72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609.201400755.

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Chamarczuk, M., M. Malinowski, D. Draganov, E. Koivisto, S. Heinonen, S. Juurela et COGITO-MIN Working Group. « Seismic Interferometry for Mineral Exploration : Passive Seismic Experiment over Kylylahti Mine Area, Finland ». Dans 2nd Conference on Geophysics for Mineral Exploration and Mining. Netherlands : EAGE Publications BV, 2018. http://dx.doi.org/10.3997/2214-4609.201802703.

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Gochioco, Lawrence M. « High‐resolution areal (3‐D) seismic survey over a coal mine reserve area ». Dans SEG Technical Program Expanded Abstracts 1991. Society of Exploration Geophysicists, 1991. http://dx.doi.org/10.1190/1.1888817.

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Rapports d'organisations sur le sujet "Seismic area"

Cant, D. Seismic expression 6 : detailed seismic line - Venture area. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/210687.

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Medrano, Carlos S. Seismic assessment of Technical Area V (TA-V). Office of Scientific and Technical Information (OSTI), mars 2014. http://dx.doi.org/10.2172/1323593.

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Cheraghi, S., J. Craven et G. Bellefleur. Passive seismic interferometry over the Lalor Lake area. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2014. http://dx.doi.org/10.4095/296309.

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Glanville, H., T. Allen, B. Stepin et C. Bugden. Seismic monitoring of NSW CGS areas : monitoring of seismic activity in the CGS production area of Camden and the seismicity of the region. Geoscience Australia, 2020. http://dx.doi.org/10.11636/record.2020.020.

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Pulpan, Hans. Seismic-hazard analysis of the Nenana agricultural development area, central Alaska. Alaska Division of Geological & Geophysical Surveys, 1986. http://dx.doi.org/10.14509/1268.

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Pulpan, Hans. Seismic-hazard analysis of the Nenana agricultural development area, central Alaska. Alaska Division of Geological & Geophysical Surveys, 1988. http://dx.doi.org/10.14509/2442.

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Gagne, R. M., et R. A. Burns. Engineering Reflection Seismic Tests Golden Pond area, Casa - Berardi Township, Quebec. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/131490.

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Crow, H., J. A. M. Hunter, G. R. Brooks et D. Motazedian. Stop 2-1 : Seismic microzonation hazard mapping in the Ottawa area. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2011. http://dx.doi.org/10.4095/289565.

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Whiteford, P. C. Repeat Measurements of Seismic Noise at the Waiotapu Geothermal Area, North Island, NZ. Office of Scientific and Technical Information (OSTI), janvier 1995. http://dx.doi.org/10.2172/895938.

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O'Connell, D. R. Seismic velocity structure and microearthquake source properties at The Geysers, California, geothermal area. Office of Scientific and Technical Information (OSTI), décembre 1986. http://dx.doi.org/10.2172/6880551.

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