Zeitschriftenartikel: „Seismological Observatory (New Zealand)“

1

Smith, Warwick D. „New Zealand earthquakes in 1989“. Bulletin of the New Zealand Society for Earthquake Engineering 23, Nr. 2 (30.06.1990): 97–101. http://dx.doi.org/10.5459/bnzsee.23.2.97-101.

Der volle Inhalt der Quelle

Annotation:

During 1989 the Seismological Observatory recorded and analysed 9892 earthquakes in the New Zealand region. Preliminary locations and magnitudes are now available for all these events. This is about five times the number usually analysed in previous years, thanks to the new digital recording equipment which is being installed throughout the country. No earthquakes reached magnitude 6 during the year, although one of magnitude 5.9 in Fiordland was close to that figure. This caused intensity MM VI throughout Fiordland, and lower intensities elsewhere in the southern half of the South Island. Earthquakes of magnitude 5 and greater are listed: they indicate an ongoing level of activity commensurate with New Zealand's seismic history and geographic location.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

2

Dowrick, D. J., und D. A. Rhoades. „Magnitudes of New Zealand earthquakes, 1901-1993“. Bulletin of the New Zealand Society for Earthquake Engineering 31, Nr. 4 (31.12.1998): 260–80. http://dx.doi.org/10.5459/bnzsee.31.4.260-280.

Der volle Inhalt der Quelle

Annotation:

Determinations of surface-wave magnitude (Ms) are made on a consistent basis for 202 selected New Zealand earthquakes over the period 1901-1993, including most post-1942 events with local magnitude not less than 6.0 and centroid depth less than 45 km. These determinations have led to a reassessment of magnitudes and locations of some earlier events in the New Zealand Seismological Observatory Catalogue of local magnitudes (ML), in some cases with substantial revisions. The surface-wave magnitudes are compared with local magnitudes and moment magnitudes (Mw), where available, and the relations between these three variables and centroid depth are examined through regression models. The absence of surface-wave observations for some earthquakes allows an upper limit to be placed on their likely moment magnitudes. The analysis shows that estimates of Mw derived from Ms will have a standard error of about 0.15 and Mw derived from ML a standard error of about 0.3.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

3

Christensen, Steven A. „Ormond earthquake liquefaction reconnaissance report“. Bulletin of the New Zealand Society for Earthquake Engineering 26, Nr. 3 (30.09.1993): 312–28. http://dx.doi.org/10.5459/bnzsee.26.3.312-328.

Der volle Inhalt der Quelle

Annotation:

On August 10 1993, at 09h 46m UT an earthquake of magnitude (ML) 6.4 occurred near Ormond, a locality to the north west of Gisbome in the North Island of New Zealand. The epicentre of the event was 38.52°S, 177.93°E, and had a focal depth of 48 km (Seismological Observatory, Institute of Geological and Nuclear Sciences Ltd.). Strong motion accelerographs at two sites on sediment in Gisborne recorded peak ground accelerations of 0.22 g at a distance of 20 km from the epicentre, while at Wairoa (80 km to the SW of the epicentre) 0.05 g was recorded, at Tolaga Bay (30 km to the NE of the epicentre) 0.09 g was measured [Pers. Comn. J. Zhou], and strong motion lasted for 5-10 s. Intensity of MMVI was observed in the Ormond area with pockets of MMVII, the later being based in particular on the presence of liquefaction.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

4

Bormann, P., und E. Bergman. „The New IASPEI Manual of Seismological Observatory Practice“. Seismological Research Letters 71, Nr. 5 (01.09.2000): 510–18. http://dx.doi.org/10.1785/gssrl.71.5.510.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

5

Leather, K., F. Andrews, R. Hall und W. Orchiston. „Coping with a New Curriculum: The Evolving Schools Program at the Carter Observatory, New Zealand“. International Astronomical Union Colloquium 162 (1998): 267–72. http://dx.doi.org/10.1017/s0252921100115222.

Der volle Inhalt der Quelle

Annotation:

Carter Observatory is the National Observatory of New Zealand and was opened in 1941. For more than ten years the Observatory has maintained an active education program for visiting school groups (see Andrews, 1991), and education now forms one of its four functions. The others relate to astronomical research; public astronomy; and the preservation of New Zealands astronomical heritage (see Orchiston and Dodd, 1995).Since the acquisition of a small Zeiss planetarium and associated visitor centre in 1992, the public astronomy and education programs at the Carter Observatory have witnessed a major expansion (see Orchiston, 1995; Orchiston and Dodd, 1996). A significant contributing factor was the introduction by the government of a new science curriculum into New Zealand schools in 1995 (Science in the New Zealand Curriculum, 1995). “Making Sense of Planet Earth and Beyond” comprises one quarter of this curriculum, and the “Beyond” component is astronomy.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

6

Kaiser, A., N. Balfour, B. Fry, C. Holden, N. Litchfield, M. Gerstenberger, E. D’Anastasio et al. „The 2016 Kaikōura, New Zealand, Earthquake: Preliminary Seismological Report“. Seismological Research Letters 88, Nr. 3 (05.04.2017): 727–39. http://dx.doi.org/10.1785/0220170018.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

7

Harper, Christopher T. „Teaching Astronomy in New Zealand: The Ward Observatory“. International Astronomical Union Colloquium 105 (1990): 354–57. http://dx.doi.org/10.1017/s0252921100087169.

Der volle Inhalt der Quelle

Annotation:

New Zealand is a self-governed, independent nation, a member of the British Commonwealth, and a major center of Polynesian culture in the south Pacific. The country’s two main islands lie between 34° and 47° south latitude, which places New Zealand south of many well known southern observing sites such as Sydney (Australia), Cape Town (South Africa), and Cordoba (Argentina).The population of 3.5 million people inhabit a country slightly larger than the United Kingdom. The astronomical interests of this small population are nourished by no less than 25 local and regional astronomical societies. Amateur astronomers are active in New Zealand. The Royal Astronomical Society of New Zealand coordinates national interests and hosts international activities.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

8

Kozlovskaya, Elena, Janne Narkilahti, Jouni Nevalainen, Riitta Hurskainen und Hanna Silvennoinen. „Seismic observations at the Sodankylä Geophysical Observatory: history, present, and the future“. Geoscientific Instrumentation, Methods and Data Systems 5, Nr. 2 (10.08.2016): 365–82. http://dx.doi.org/10.5194/gi-5-365-2016.

Der volle Inhalt der Quelle

Annotation:

Abstract. Instrumental seismic observations in northern Finland started in the 1950s. They were originally initiated by the Institute of Seismology of the University of Helsinki (ISUH), but the staff of Sodankylä Geophysical Observatory (SGO) and later geophysicists of the University of Oulu (UO) were involved in the development of seismological observations and research in northern Finland from the very beginning. This close cooperation between seismologists and the technical staff of ISUH, UO, and SGO continued in many significant international projects and enabled a high level of seismological research in Finland. In our paper, we present history and current status of seismic observations and seismological research in northern Finland at the UO and SGO. These include both seismic observations at permanent seismic stations and temporary seismic experiments with portable seismic equipment. We describe the present seismic instrumentation and major research topics of the seismic group at SGO and discuss plans for future development of permanent seismological observations and portable seismic instrumentation at SGO as part of the European Plate Observing System (EPOS) research infrastructure. We also present the research topics of the recently organized Laboratory of Applied Seismology, and show examples of seismic observations performed by new seismic equipment located at this laboratory and selected results of time-lapse seismic body wave travel-time tomography using the data of microseismic monitoring in the Pyhäsalmi Mine (northern Finland).

APA, Harvard, Vancouver, ISO und andere Zitierweisen

9

Robinson, D., S. Dick, R. Stone und B. Loader. „Black Birch Astrometric Observatory“. Symposium - International Astronomical Union 118 (1986): 103. http://dx.doi.org/10.1017/s0074180900151186.

Der volle Inhalt der Quelle

Annotation:

The seven inch transit circle near Blenheim, New Zealand is intended in conjunction with the six inch circle at Washington, to produce a fundamental catalogue and to re-observe the Southern Reference Stars.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

10

Bush, Martin. „Mary Proctor and the Cawthron observatory project: a lost history of the Mount Stromlo Observatory“. Historical Records of Australian Science 33, Nr. 1 (11.01.2022): 12–22. http://dx.doi.org/10.1071/hr21007.

Der volle Inhalt der Quelle

Annotation:

Between 1912 and 1914, the Anglo-American popularizer of astronomy, Mary Proctor, undertook a tour of Australia and New Zealand in order to promote a solar observatory project that would ultimately be realized as the Mount Stromlo Observatory in Australia. Proctor came at the request of Walter Geoffrey Duffield, who would go on to be the first Director of the Mt Stromlo Observatory and who saw the need to raise funds and public support for the project. Proctor’s tour was high-profile and nearly saw the realization of a solar observatory as part of the Cawthron Institute at Nelson, New Zealand. Despite this, Proctor’s tour is absent from histories of Mount Stromlo and, until recently, had also been overlooked in New Zealand. I argue that this historical lacuna speaks to a number of historiographical biases: for success over failure; against the role of public activities in scientific work; and downplaying the contribution of women. Mary Proctor was a significant transitional figure in the history of early twentieth-century science-communication who should be more widely recognised.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

11

TAID, M., A. C. LYNGDOH und A. K. GHOSE. „Determining earthquake epicentre from a single 3-component seismological station“. MAUSAM 60, Nr. 1 (27.11.2021): 81–88. http://dx.doi.org/10.54302/mausam.v60i1.1017.

Der volle Inhalt der Quelle

Annotation:

An attempt has been made in this study to determine the epicentres by trigonometrical method from a single station using the three components of the ground's motion recorded by the Benioff Short Period Seismograph of the World Wide Standardized Seismograph Network (WWSSN) at Central Seismological Observatory (C.S.O.), Shillong. The trigonometrical method is based on the angle of bearing obtained from the ratio of the amplitudes of waves recorded on the horizontal components of the WWSSN seismograms. A comparison of recorded epicentres from the I.M.D. Seismological Network of Seismo, New Delhi with that of a single station i.e., C.S.O., Shillong has been made to estimate the accuracy of the method. The characteristics of the epicentral variations obtained from the Seismological Network of Seismo, New Delhi with that of C.S.O., Shillong are relatively small for local earthquakes compared to regional earthquakes with C.S.O., Shillong as the reference station. The characteristics of the epicentral variations particularly in the Shillong plateau are observed to be minimum. Strong correlations of epicentres are observed for both local as well as regional earthquake events.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

12

Orchiston, W., B. Carter, R. Dodd und R. Hall. „Selling Our Southern Skies: recent public astronomy developments at the Carter Observatory, New Zealand“. International Astronomical Union Colloquium 162 (1998): 214–19. http://dx.doi.org/10.1017/s025292110011512x.

Der volle Inhalt der Quelle

Annotation:

Carter Observatory is the gazetted National Observatory of New Zealand, and opened in 1941 December. From the start, the main function of the Observatory was to provide for the astronomical needs of the citizens of, and visitors to, the Wellington region, and today this remains one of its four recognised functions (Orchiston and Dodd, 1995). The other three are to conduct astronomical research of international significance; provide a national astronomy education service for school students, teachers, and trainee teachers; and assist in the preservation of New Zealand's astronomical heritage.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

13

Kellett, R. L., I. J. Ferguson und F. E. M. Lilley. „Magnetic field fluctuations at the Eyrewell Observatory, Christchurch, New Zealand“. New Zealand Journal of Geology and Geophysics 31, Nr. 1 (Januar 1988): 87–93. http://dx.doi.org/10.1080/00288306.1988.10417812.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

14

Scordilis, E., D. Kementzetzidou und B. Papazachos. „Local magnitude estimation in Greece, based on recordings of the Hellenic Unified Seismic Network (HUSN).“ Bulletin of the Geological Society of Greece 47, Nr. 3 (21.12.2016): 1241. http://dx.doi.org/10.12681/bgsg.10980.

Der volle Inhalt der Quelle

Annotation:

A new relation is proposed for calculation of local magnitudes in Greece. For this purpose, there were used synthetic Wood-Anderson (SWA) recordings of 98 digital broad-band stations operating between 2007 and 2011. These stations are installed at the sites of the seismological networks of: a) the National Observatory of Athens(HL), b) the Department of Geophysics of the Aristotle University of Thessaloniki (HT), c) the Seismological Laboratory of the University of Athens (HA) and d) the Seismological Laboratory of the University of Patras (HP). All these institutions constitute the recently (2004) established Hellenic Unified Seismic Network (HUSN). These recordings are used to calculate a refined geometrical spreading factor and an anelastic attenuation coefficient, representative for Greece and surrounding area, proper for estimating local magnitudes in this region. Individual station corrections are also calculated in order to further ameliorate magnitude estimation accuracy. Comparison of such calculated local magnitudes with corresponding original moment magnitudes revealed that these two scales are equivalent for awide range of values (2.9≤MW≤6.4).

APA, Harvard, Vancouver, ISO und andere Zitierweisen

15

Hearnshaw, John. „A new Starlight Reserve for the central South Island of New Zealand“. Proceedings of the International Astronomical Union 10, H16 (August 2012): 736. http://dx.doi.org/10.1017/s1743921314013192.

Der volle Inhalt der Quelle

Annotation:

AbstractThe Aoraki Mackenzie International Dark Sky Reserve is a new reserve created in 2012 by the International Dark-Sky Association in the central South Island of New Zealand, and covers over 4300 square kilometres around Mt John University Observatory. It is the first such reserve to be recognized at gold tier level and is the largest dark sky reserve in the world. Astro-tourism in the new reserve will be a prominent activity in the coming years.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

16

Pettinga, Jarg R., Mark D. Yetton, Russ J. Van Dissen und Gaye Downes. „Earthquake source identification and characterisation for the Canterbury region, South Island, New Zealand“. Bulletin of the New Zealand Society for Earthquake Engineering 34, Nr. 4 (31.12.2001): 282–317. http://dx.doi.org/10.5459/bnzsee.34.4.282-317.

Der volle Inhalt der Quelle

Annotation:

The Canterbury region of the South Island of New Zealand straddles a wide zone of active earth deformation associated with the oblique continent-continent collision between the Australian and Pacific tectonic plates east of the Alpine fault. The associated ongoing crustal strain is documented by the shallow earthquake activity (at depths of <40 km) and surface deformation expressed by active faulting, folding and ongoing geodetic strain. The level of earth deformation activity (and consequent earthquake hazard) decreases from the northwest to the southeast across the region. Deeper-level subduction related earthquake events are confined to the northernmost parts of the region, beneath Marlborough. To describe the geological setting and seismological activity in the region we have sub-divided the Canterbury region into eight domains that are defined on the basis of structural styles of deformation. These eight domains provide an appropriate geological and seismological context on which seismic hazard assessment can be based. A further, ninth source domain is defined to include the Alpine fault, but lies outside the region. About 90 major active earthquake source faults within and surrounding the Canterbury region are characterised in terms of their type (sense of slip), geometry (fault dimensions and attitude) and activity (slip rates, single event displacements, recurrence intervals, and timing of last rupture). In the more active, northern part of the region strike-slip and oblique strike-slip faults predominate, and recurrence intervals range from 81 to >5,000 years. In the central and southern parts of the region oblique-reverse and reverse/thrust faults predominate, and recurrence intervals typically range from -2,500 to >20,000 years. In this study we also review information on significant historical earthquakes that have impacted on the region (e,g. Christchurch earthquakes 1869 and 1870; North Canterbury 1888; Cheviot 1902; Motunau 1922; Buller 1929; Arthurs Pass 1929 and 1994; and others), and the record of instrumental seismicity. In addition, data from available paleoseismic studies within the region are included; and we also evaluate large potential earthquake sources outside the Canterbury region that are likely to produce significant shaking within the region. The most important of these is the Alpine fault, which we include as a separate source domain in this study. The integrated geological and seismological data base presented in this paper provide the foundation for the probabilistic seismic hazard assessment for the Canterbury region, and this is presented in a following companion paper in this Bulletin (Stirling et al. this volume).

APA, Harvard, Vancouver, ISO und andere Zitierweisen

17

Grapes, Rodney, und Gaye Downes. „The 1855 Wairarapa, New Zealand, earthquake“. Bulletin of the New Zealand Society for Earthquake Engineering 30, Nr. 4 (31.12.1997): 271–368. http://dx.doi.org/10.5459/bnzsee.30.4.271-368.

Der volle Inhalt der Quelle

Annotation:

Nearly 200 historical accounts have been examined and analysed in order to determine the effects of the magnitude 8+ 1855 Wairarapa, New Zealand, earthquake. The documents examined include contemporary diaries, letters and journals, newspaper reports and articles, archives, memoranda and reports of the Wellington Provincial Government as well as later reminiscences, extracts from published scientific papers, books and other articles. Other than the published accounts of Sir Charles Lyell, who, in 1856, first recognised the importance of the earthquake as causing the greatest deformation and surface fault rupture then known, there has been no comprehensive account of the effects of the earthquake in the scientific literature until now. Much or the data is presented with extensive quotations from the source material, especially where conflicting accounts on important aspects have been found. All material is analysed with an understanding of the geographical, social and political conditions at the time. The reliability of the material is taken account of so that first-hand accounts, that have been recorded no more than several years after the earthquake, and in which there are no obvious inconsistencies or confusion with other earthquakes, are valued most highly. Using the historical accounts as the primary source of data, but also taking into account the results of more recent geological, geomorphological and seismological investigations of the deformation, many aspects of the earthquake are discussed in detail. These are mainshock magnitude and epicentre; felt intensity distribution: descriptive account of the effects of the mainshock on people (including casualties) and man-made structures by location throughout New Zealand (including a resume of contemporary building techniques): effects on the environment from strong shaking such as fissuring, liquefaction, spreading, subsidence and landslides, and from tectonically produced uplift, subsidence and faulting; biological effects; tsunami and seiche; aftershock occurrence and social response and recovery.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

18

Cottrell, P. L. „New Zealand Astronomy in the 1990s“. Publications of the Astronomical Society of Australia 9, Nr. 1 (1991): 64–68. http://dx.doi.org/10.1017/s1323358000024917.

Der volle Inhalt der Quelle

Annotation:

AbstractThere has been a dramatic increase in astronomical research output in New Zealand over the last decade. This is set to increase with the advent of a number of new pieces of astronomical hardware over the last five years. These include the 1m telescope and associated instrumentation at Mount John and the JANZOS collaboration, with its instrumentation on Black Birch. Black Birch is also the site of the US Naval Observatory’s southern hemisphere astrometric station, where, using a transit circle instrument, they are collecting data which will form part of the International Reference Star Catalogue. As well as these ‘professional’ programs there is also a large network of amateur astronomers, who can provide extremely useful input into certain astronomical programs at the various observatories around the country and the world.A brief overview of the existing New Zealand astronomical scene will be followed by discussion of a number of new initiatives being proposed, which includes an automatic patrol telescope being developed by Carter Observatory, an expansion of the JANZOS collaboration and initial discussion about the possibility of an eastern arm for the Australia Telescope some where in New Zealand. In addition, for programs which require a long timebase of observations, extreme southerly latitudes or longitudinal coverage, New Zealand could provide a unique opportunity.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

19

Stern, T., W. Stratford, A. Seward, M. Henderson, M. Savage, E. Smith, A. Benson, S. Greve und M. Salmon. „Crust–mantle structure of the central North Island, New Zealand, based on seismological observations“. Journal of Volcanology and Geothermal Research 190, Nr. 1-2 (Februar 2010): 58–74. http://dx.doi.org/10.1016/j.jvolgeores.2009.11.017.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

20

Sollberger, David, Heiner Igel, Cedric Schmelzbach, Pascal Edme, Dirk-Jan van Manen, Felix Bernauer, Shihao Yuan, Joachim Wassermann, Ulrich Schreiber und Johan O. A. Robertsson. „Seismological Processing of Six Degree-of-Freedom Ground-Motion Data“. Sensors 20, Nr. 23 (03.12.2020): 6904. http://dx.doi.org/10.3390/s20236904.

Der volle Inhalt der Quelle

Annotation:

Recent progress in rotational sensor technology has made it possible to directly measure rotational ground-motion induced by seismic waves. When combined with conventional inertial seismometer recordings, the new sensors allow one to locally observe six degrees of freedom (6DOF) of ground-motion, composed of three orthogonal components of translational motion and three orthogonal components of rotational motion. The applications of such 6DOF measurements are manifold—ranging from wavefield characterization, separation, and reconstruction to the reduction of non-uniqueness in seismic inverse problems—and have the potential to revolutionize the way seismic data are acquired and processed. However, the seismological community has yet to embrace rotational ground-motion as a new observable. The aim of this paper is to give a high-level introduction into the field of 6DOF seismology using illustrative examples and to summarize recent progress made in this relatively young field. It is intended for readers with a general background in seismology. In order to illustrate the seismological value of rotational ground-motion data, we provide the first-ever 6DOF processing example of a teleseismic earthquake recorded on a multicomponent ring laser observatory and demonstrate how wave parameters (phase velocity, propagation direction, and ellipticity angle) and wave types of multiple phases can be automatically estimated using single-station 6DOF processing tools. Python codes to reproduce this processing example are provided in an accompanying Jupyter notebook.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

21

Gledhill, K., J. Ristau, M. Reyners, B. Fry und C. Holden. „The Darfield (Canterbury, New Zealand) Mw 7.1 Earthquake of September 2010: A Preliminary Seismological Report“. Seismological Research Letters 82, Nr. 3 (01.05.2011): 378–86. http://dx.doi.org/10.1785/gssrl.82.3.378.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

22

Moratalla, Jose M., Tatiana Goded, David A. Rhoades, Silvia Canessa und Matthew C. Gerstenberger. „New Ground Motion to Intensity Conversion Equations (GMICEs) for New Zealand“. Seismological Research Letters 92, Nr. 1 (30.09.2020): 448–59. http://dx.doi.org/10.1785/0220200156.

Der volle Inhalt der Quelle

Annotation:

Abstract Macroseismic intensities play a key role in the engineering, seismological, and loss modeling communities. However, at present, there is an increasing demand for instrumental data-based loss estimations that require statistical relationships between intensities and strong-motion data. In New Zealand, there was an urgent need to update the ground motion to intensity conversion equation (GMICE) from 2007, developed prior to a large number of recent earthquakes including the 2010–2011 Canterbury and 2016 Kaikōura earthquake sequences. Two main factors now provide us with the opportunity to update New Zealand’s GMICE: (1) recent publication of New Zealand’s Strong-Motion Database, corresponding to 276 New Zealand earthquakes with magnitudes 3.5–7.8 and 4–185 km depths; and (2) recent generation of a community intensity database from GeoNet’s “Felt Classic” (2004–2016) and “Felt Detailed” (2016–2019) questionnaires, corresponding to around 930,000 individual reports. Ground-motion data types analyzed are peak ground velocity (PGV) and peak ground acceleration (PGA). The intensity database contains 67,572 felt reports from 917 earthquakes, with magnitudes 3.5–8.1, and 1797 recordings from 247 strong-motion stations (SMSs), with hypocentral distances of 5–345 km. Different regression analyses were tested, and the bilinear regression of binned mean strong-motion recordings for 0.5 modified Mercalli intensity bins was selected as the most appropriate. Total least squares regression was chosen for reversibility in the conversions. PGV provided the best-fitting results, with lower standard deviations. The influence of hypocentral distance, earthquake magnitude, and the site effects of local geology, represented by the mean shear-wave velocity in the first 30 m depth, on the residuals was also explored. A regional correction factor for New Zealand, suitable for adjustment of global relationships, has also been estimated.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

23

Oyarzo-Vera, Claudio A., Graeme H. McVerry und Jason M. Ingham. „Seismic Zonation and Default Suite of Ground-Motion Records for Time-History Analysis in the North Island of New Zealand“. Earthquake Spectra 28, Nr. 2 (Mai 2012): 667–88. http://dx.doi.org/10.1193/1.4000016.

Der volle Inhalt der Quelle

Annotation:

A seismic zonation to be used in the selection of ground-motion records for time-history analysis of buildings in the North Island of New Zealand is presented. Both deaggregations of the probabilistic seismic hazard model and the seismological characteristics of the expected ground motions at different locations were considered in order to define the zonation. A profile of the records expected to apply within each zone according to the identified hazard scenarios is presented and suites of records are proposed for each zone, based on region-wide criteria, to be used in time-history analysis in the absence of site specific studies. A solution for structures with fundamental periods of between 0.4 and 2.0 seconds is proposed, considering a 500-year return period and two common site classes (C and D, according to the New Zealand Loadings Standard).

APA, Harvard, Vancouver, ISO und andere Zitierweisen

24

Hughes, J. A., M. D. Robinson, F. S. Gauss und R. C. Stone. „The Seven-Inch Transit Circle and its New Zealand Program“. Symposium - International Astronomical Union 109 (1986): 483–96. http://dx.doi.org/10.1017/s0074180900076956.

Der volle Inhalt der Quelle

Annotation:

The modernization of the seven-inch transit circle is an important aspect of the envisioned Naval Observatory observing effort. This task has been carried out on the basis of the following desiderata:1) The basic sensor should be photoelectric2) Point sources observable at night down to at least m=103) Venus, Mercury and stars down to m=4 observable in the daytime4) Mars, Jupiter, Saturn, Uranus, Neptune and the Moon observable5) The Sun must be observable6) The instrumental parameters: azimuth, level, collimation, nadir, and so on must be determined so as to allow absolute observations7) The system should operate essentially autonomously, but an observer should be kept in the observing “loop”.It appears that all of these objectives have been achieved by the system now to be briefly described.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

25

Anderson, Helen, Sarah Beanland, Graeme Buck, Des Darby, Gaye Downes, John Haines, James Jackson, Russell Robinson und Terry Webb. „The 1968 May 23 Inangahua, New Zealand, earthquake: An integrated geological, geodetic, and seismological source model“. New Zealand Journal of Geology and Geophysics 37, Nr. 1 (März 1994): 59–86. http://dx.doi.org/10.1080/00288306.1994.9514601.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

26

Berrill, J. B., P. C. Mulqueen und E. T. C. Ooi. „Liquefaction at Kaiapoi in the 1901 Cheviot, New Zealand, earthquake“. Bulletin of the New Zealand Society for Earthquake Engineering 27, Nr. 3 (30.09.1994): 178–89. http://dx.doi.org/10.5459/bnzsee.27.3.178-189.

Der volle Inhalt der Quelle

Annotation:

Seismic liquefaction occurred in northeast Kaiapoi during the 1901 Cheviot earthquake. A contemporary newspaper report describes the ejection of sand and lateral spreading in Waites' market garden at the east end of Sewell Street, Kaiapoi and also south of the Waimakariri River near Belfast. Piezocone probing and rotary drilling on the Waites property in Sewell Street and at three other sites in northeast Kaiapoi found loose, fine sands and silty sands with cone resistance 4: as low as 2 to 3 MPa; it is not surprising that liquefaction was observed in 1901. Lack of precise seismological parameters for the 1901 earthquake precludes any definite conclusions about the performance of liquefaction potential models. However, the occurrence of liquefaction strongly suggests that the M6.5 magnitude estimated by Dibble et al. [1980] is too small, and that local magnitude in 1901 was larger than the surface-wave value of about 6.9 of Dowrick and Smith [1990]. A value in the range of 7.1 to 7.5 seems more likely. Comparison of Dutch cone penetrometer resistances and standard penetration test N-values supports the old qc (bars)/N = 4 rule. Because of the large amount of scatter, use of the more refined rule of Robertson of Campanella, where qc /N is a function of D50, does not seem justified. The penetration testing results confirm that there is a significant risk of liquefaction at Kaiapoi. Furthermore, we now have four reference sites, each with slightly different soil conditions, whose performance can be monitored following future earthquakes in the region.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

27

Dodd, R. J., und W. Orchiston. „Research Programs at the Carter Observatory: An Overview“. Publications of the Astronomical Society of Australia 13, Nr. 2 (Mai 1996): 162–64. http://dx.doi.org/10.1017/s1323358000020725.

Der volle Inhalt der Quelle

Annotation:

AbstractAn outline is given of the main research programs currently in progress at the Carter Observatory. These include: the establishment of a set of standard star magnitudes and colours in the Vilnius seven-colour photometric system; the study of galactic and extragalactic star clusters using Vilnius and broadband photometries; binary stars and the development of APTs; and the history of Australasian astronomy. The role of Carter Observatory Honorary Research Associates is described and mention is made of the joint New Zealand/Japan program to observe gravitational microlensing effects, discover variable stars and patrol selected clusters of galaxies for supernovae.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

28

Wolf, George W., und Janet T. Kern. „Spectral classification of eclipsing binaries“. Symposium - International Astronomical Union 118 (1986): 463–64. http://dx.doi.org/10.1017/s0074180900151940.

Der volle Inhalt der Quelle

Annotation:

Approximately 375 classification spectra of 130 Southern Hemisphere eclipsing binary stars were obtained between 1978 and 1982 at Mt. John University Observatory, New Zealand using the 0.6 meter reflector, and at Cerro Tololo Inter-American Observatory, Chile using the 0.4, 0.6, 0.9, and 1.0 meter telescopes. The spectra have been classified by one of us (GWW) using a grid of standards obtained on the various spectrographs at each of the observatories. Since many of the spectra were taken during primary and secondary minima, it has been possible in many cases to classify separately each component in the binaries.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

29

Kaiser, Anna, Chris Van Houtte, Nick Perrin, Liam Wotherspoon und Graeme McVerry. „Site characterisation of GeoNet stations for the New Zealand Strong Motion Database“. Bulletin of the New Zealand Society for Earthquake Engineering 50, Nr. 1 (31.03.2017): 39–49. http://dx.doi.org/10.5459/bnzsee.50.1.39-49.

Der volle Inhalt der Quelle

Annotation:

The New Zealand Strong Motion Database provides a wealth of new strong motion data for engineering applications. In order to utilise these data in ground motion prediction, characterisation of key site parameters at each of the ~497 past and present GeoNet strong motion stations represented in the database is required. Here, we present the compilation of a complete set of site metadata for the New Zealand database, including four key parameters: i) NZS1170.5 site subsoil classification, ii) the time-averaged shear-wave velocity to a depth of 30 m (Vs30), iii) fundamental site period (Tsite) and iv) depth to a shear-wave velocity of 1000 m/s (Z1.0, a proxy for depth to bedrock). In addition, we have assigned a quality estimate (Quality 1 – 3) to each numerical parameter to provide a qualitative estimate of the uncertainty. New high-quality Tsite, Vs30 and Z1.0 estimates have been obtained from a variety of recent studies, and reconciled with available geological information. This database will be used in efforts to guide development and testing of new and existing ground motion prediction models in New Zealand, allowing re-examination of the most important site parameters that control site response in a New Zealand setting. Preliminary analyses, using the newly compiled data, suggest that high quality site parameters can reduce uncertainty in ground motion prediction. Furthermore, the database can be used to identify suitable rock reference sites for seismological research, and as a guide to more detailed site-specific references in the literature. The database provides an additional resource for informing engineering design, however it is not suitable as a replacement for site-specific assessment.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

30

Moshou, Alexandra, Panagiotis Argyrakis, Antonios Konstantaras, Anna-Christina Daverona und Nikos C. Sagias. „Characteristics of Recent Aftershocks Sequences (2014, 2015, 2018) Derived from New Seismological and Geodetic Data on the Ionian Islands, Greece“. Data 6, Nr. 2 (20.01.2021): 8. http://dx.doi.org/10.3390/data6020008.

Der volle Inhalt der Quelle

Annotation:

In 2014–2018, four strong earthquakes occurred in the Ionian Sea, Greece. After these events, a rich aftershock sequence followed. More analytically, according to the manual solutions of the National Observatory of Athens, the first event occurred on 26 January 2014 in Cephalonia Island with magnitude ML = 5.8, followed by another in the same region on 3 February 2014 with magnitude ML = 5.7. The third event occurred on 17 November 2015, ML = 6.0 in Lefkas Island and the last on 25 October 2018, ML = 6.6 in Zakynthos Island. The first three of these earthquakes caused moderate structural damages, mainly in houses and produced particular unrest to the local population. This work determines a seismic moment tensor for both large and intermediate magnitude earthquakes (M > 4.0). Geodetic data from permanent GPS stations were analyzed to investigate the displacement due to the earthquakes.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

31

Wallace, Laura M., John Beavan, Robert McCaffrey, Kelvin Berryman und Paul Denys. „Balancing the plate motion budget in the South Island, New Zealand using GPS, geological and seismological data“. Geophysical Journal International 168, Nr. 1 (Januar 2007): 332–52. http://dx.doi.org/10.1111/j.1365-246x.2006.03183.x.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

32

Burlotos, Christianos, Kevin Walsh, Tatiana Goded, Graeme McVerry, Nicholas Brooke und Jason Ingham. „Seismic zonation and default suites of ground-motion records for time-history analysis in the South Island of New Zealand“. Bulletin of the New Zealand Society for Earthquake Engineering 55, Nr. 1 (01.03.2022): 25–42. http://dx.doi.org/10.5459/bnzsee.55.1.25-42.

Der volle Inhalt der Quelle

Annotation:

The rise of performance-based earthquake engineering, in combination with the complexity associated with selecting records for time-history analysis, demonstrates an expressed need for localized default suites of ground motion records for structural designers to use in the absence of site-specific studies. In the current research investigation, deaggregations of probabilistic seismic hazard models (National Seismic Hazard Model, Canterbury Seismic Hazard Model, and Kaikōura Seismic Hazard Model) and the location-specific seismological characteristics of expected ground motions were used to define eight seismic hazard zonations and accompanying suite profiles for the South Island of New Zealand to satisfy the requirements of the New Zealand structural design standard NZS1170.5 for response-history analyses. Specific records, including 21 from the recent Kaikōura, Darfield, and Christchurch earthquakes, were then selected from publicly-available databases and presented as default suites for use in time-history analyses in the absence of site-specific studies. This investigation encompasses seismic hazards corresponding to 500-year return periods, site classes C (shallow soils) and D (deep soils), and buildings with fundamental periods between 0.4 and 2.0 seconds.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

33

Orchiston, W., und R. J. Dodd. „Education and Public Astronomy Programs at the Carter Observatory: An Overview“. Publications of the Astronomical Society of Australia 13, Nr. 2 (Mai 1996): 165–72. http://dx.doi.org/10.1017/s1323358000020737.

Der volle Inhalt der Quelle

Annotation:

AbstractThis paper outlines the extensive range of public programs offered by the Carter Observatory, including ‘public nights’, new planetarium and audio-visual shows, displays, the Carter Memorial Lectures, the annual Astronomical Handbook and other publications, a monthly newspaper column and three monthly radio programs. It also deals with the Observatory’s involvement in undergraduate and postgraduate astronomy at Victoria University of Wellington, various adult education training programs, ‘Overnight Extravaganzas’, holiday programs, and the recent development of the Education Service in response to the introduction of an astronomy curriculum into schools throughout New Zealand. Some possible future developments in the public astronomy and education areas are also discussed.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

34

Anderson, Helen, Euan Smith und Russell Robinson. „Normal faulting in a back arc basin: Seismological characteristics of the March 2, 1987, Edgecumbe, New Zealand, Earthquake“. Journal of Geophysical Research 95, B4 (1990): 4709. http://dx.doi.org/10.1029/jb095ib04p04709.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

35

Weaver, K. C., S. C. Cox, J. Townend, H. Rutter, I. J. Hamling und C. Holden. „Seismological and Hydrogeological Controls on New Zealand-Wide Groundwater Level Changes Induced by the 2016 Mw7.8 Kaikōura Earthquake“. Geofluids 2019 (27.06.2019): 1–18. http://dx.doi.org/10.1155/2019/9809458.

Der volle Inhalt der Quelle

Annotation:

The 2016 Mw7.8 Kaikōura earthquake induced groundwater level changes throughout New Zealand. Water level changes were recorded at 433 sites in compositionally diverse, young, shallow aquifers, at distances of between 4 and 850 km from the earthquake epicentre. Water level changes are inconsistent with static stress changes but do correlate with peak ground acceleration (PGA). At PGAs exceeding ~2 m/s2, water level changes were predominantly persistent increases. At lower PGAs, there were approximately equal numbers of persistent water level increases and decreases. Shear-induced consolidation is interpreted to be the predominant mechanism causing groundwater changes at accelerations exceeding ~2 m/s2, whereas permeability enhancement is interpreted to predominate at lower levels of ground acceleration. Water level changes occur more frequently north of the epicentre, as a result of the fault’s northward rupture and resulting directivity effects. Local hydrogeological conditions also contributed to the observed responses, with larger water level changes occurring in deeper wells and in well-consolidated rocks at equivalent PGA levels.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

36

Cropp, Malcolm, Karen R. Pollard und Jovan Skuljan. „Spectroscopy of southern δ Scuti stars“. International Astronomical Union Colloquium 193 (2004): 275–78. http://dx.doi.org/10.1017/s0252921100010782.

Der volle Inhalt der Quelle

Annotation:

AbstractFour δ Scuti stars were observed with the HERCULES fibrefed échelle spectrograph at Mount John University Observatory, New Zealand. These observations were analysed by looking at the radial velocity variations as given by a cross-correlation technique as well as spectral line moment variations. These results were compared to published photometric studies of these stars to see if the modes identified in the photometry were also present in the spectroscopic data obtained.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

37

Quigley, Mark, und Brendan Duffy. „Effects of Earthquakes on Flood Hazards: A Case Study From Christchurch, New Zealand“. Geosciences 10, Nr. 3 (23.03.2020): 114. http://dx.doi.org/10.3390/geosciences10030114.

Der volle Inhalt der Quelle

Annotation:

Earthquakes can influence flood hazards by altering the flux, volumes, and distributions of surface and/or subsurface waters and causing physical changes to natural and engineered environments (e.g., elevation, topographic relief, permeability) that affect surface and subsurface hydrologic regimes. This paper analyzes how earthquakes increased flood hazards in Christchurch, New Zealand, using empirical observations and seismological data. Between 4 September 2010 and 4 December 2017, this region hosted one moment magnitude (Mw) 7.1 earthquake, 3 earthquakes with Mw ≥ 6, and 31 earthquakes with local magnitude (ML) ≥ 5. Flooding related to liquefaction-induced groundwater pore-water fluid pressure perturbations and groundwater expulsion occurred in at least six earthquakes. Flooding related to shaking-induced ground deformations (e.g., subsidence) occurred in at least four earthquakes. Flooding related to tectonic deformations of the land surface (fault surface rupture and/or folding) occurred in at least two earthquakes. At least eight earthquakes caused damage to surface (e.g., buildings, bridges, roads) and subsurface (e.g., pipelines) infrastructure in areas of liquefaction and/or flooding. Severe liquefaction and associated groundwater-expulsion flooding in vulnerable sediments occurred at peak ground accelerations as low as 0.15 to 0.18 g (proportion of gravity). Expected return times of liquefaction-induced flooding in vulnerable sediments were estimated to be 100 to 500 years using the Christchurch seismic hazard curve, which is consistent with emerging evidence from paleo-liquefaction studies. Liquefaction-induced subsidence of 100 to 250 mm was estimated for 100-year peak ground acceleration return periods in parts of Christchurch.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

38

Tobin, William, A. C. Gilmore, Alan Wadsworth und S. R. D. West. „First CCD observations of Magellanic Cloud variable stars from the Mt John University Observatory, New Zealand“. Symposium - International Astronomical Union 148 (1991): 381. http://dx.doi.org/10.1017/s0074180900200934.

Der volle Inhalt der Quelle

Annotation:

Late in 1988 the Mt John University Observatory acquired a cryogenic CCD system from Photometrics Ltd (Tucson). The chip is a Thomson CSF TH7882 CDA comprising 384 × 576 pixels. As part of the evaluation process, we have begun two differential photometry programs of the Magellanic Clouds using the Mt John 0.6m Boller & Chivens telescope. On this telescope each CCD pixel corresponds to 0.6 arcsec. Mt John's southerly latitude (44°S) permits year-round observations of the Clouds.The first program concerns B, V and I photometry of five blue eclipsing binaries selected, on the basis of Gaposchkin's (1970, 1977) photographic light curves, to have roughly equal components with minimal interaction. HV 12634 has also been observed for comparison with the CCD light curves published by Jensen et al. (1988). Fig. 1 shows the B observations so far obtained for HV 1761, but the reduction is preliminary, being based on aperture-integrated magnitudes. The field is populous, and a final reduction will require use of a crowded-field reduction package such as ROMAFOT.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

39

Santarelli, Lucia, Paolo Bagiacchi, Giovanni Benedetti, Domenico Di Mauro und Stefania Lepidi. „A New Installation for Geomagnetic Field Monitoring at Talos Dome, a Remote Antarctic Site Away from Permanent Observatories“. Remote Sensing 15, Nr. 2 (06.01.2023): 339. http://dx.doi.org/10.3390/rs15020339.

Der volle Inhalt der Quelle

Annotation:

An automatic geomagnetic station for monitoring the Earth’s magnetic field variations was installed in December 2020 at Talos Dome, a remote site on the Antarctic Plateau, about 300 km away from the permanent geomagnetic observatory at Mario Zucchelli Station (MZS). Designed and assembled at the laboratory of electronics of the Istituto Nazionale di Geofisica e Vulcanologia (INGV) in Rome, this autonomous station is formed by a vector magnetometer specifically manufactured by Lviv Institute (Ukraine) for very low temperatures and a low-power system supplied by batteries charged by a wind generator and solar panel. Data, sampled at 1 Hz, are locally stored and can be downloaded once a year during the Antarctic summer expeditions. The goal was to integrate observatory data for better monitoring the geomagnetic field from an uncovered Antarctic area. In fact, it is well known that the distribution of geomagnetic observatories strongly favors the northern hemisphere, and each new instrumental installation in Antarctica should be considered as a useful attempt to balance the geomagnetic monitoring in the two hemispheres. The achieved goal was to obtain a long data series, keeping the station working even during the austral winter when the temperature can reach −60 °C; we recorded almost 11 months of data in one year and the station is still operating. Data from the new station, jointly with data from permanent observatories, improve the analysis of the magnetospheric dynamics and the ionosphere–magnetosphere coupling. Talos Dome, together with the Italian geomagnetic observatory at Mario Zucchelli Station and New Zealand geomagnetic observatory at Scott Base, constitutes a network along the 80°S geomagnetic parallel, which is interesting for studying the longitudinal propagation of geomagnetic signals of external origin. In this work we present the characteristics of the station and of the data it provides, with the aim of them for analysis in the framework of space weather.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

40

Pollard, K. R., E. Brunsden, P. L. Cottrell, M. Davie, A. Greenwood, D. J. Wright und P. De Cat. „Mode identification from spectroscopy of gravity-mode pulsators“. Proceedings of the International Astronomical Union 9, S301 (August 2013): 477–78. http://dx.doi.org/10.1017/s1743921313015135.

Der volle Inhalt der Quelle

Annotation:

AbstractThe gravity modes present in γ Doradus stars probe the deep stellar interiors and are thus of particular interest in asteroseismology. For the MUSICIAN programme at the University of Canterbury, we obtain extensive high-resolution echelle spectra of γ Dor stars from the Mt John University Observatory in New Zealand. We analyze these to obtain the pulsational frequencies and identify these with the multiple pulsational modes excited in the star. A summary of recent results from our spectroscopic mode-identification programme is given.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

41

Robinson, R. „Aftershocks of the 1987 Edgecumbe earthquake, New Zealand: Seismological and structural studies using portable seismographs in the epicentral region“. New Zealand Journal of Geology and Geophysics 32, Nr. 1 (Januar 1989): 61–72. http://dx.doi.org/10.1080/00288306.1989.10421389.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

42

Rowe, Glen H. „New Zealand's first gauge-based sea level measurements“. History of Geo- and Space Sciences 14, Nr. 1 (16.06.2023): 77–92. http://dx.doi.org/10.5194/hgss-14-77-2023.

Der volle Inhalt der Quelle

Annotation:

Abstract. James Cook's second voyage to the South Seas, undertaken to settle the question regarding the existence or otherwise of the “Great Southern Continent” (Terra Australis Incognita), involved two vessels, the Resolution and Adventure. The Board of Longitude appointed two astronomers from the Royal Observatory, Greenwich, to the voyage, William Wales and William Bayly, respectively, one to each vessel. They were instructed, in addition to their astronomical duties, to observe the height and time of the tides. To this end, Bayly and Wales fabricated tide gauges and conducted timed measurements of sea level during their stopovers in New Zealand during 1773. This paper reviews those tidal observations, the first of their kind in New Zealand, using modern understanding of the tide, assuming that no significant change in the tidal regime at each location has taken place during the intervening period. When compared to the predicted (hindcast) astronomical tide, the majority (80 %) of the observed ranges and times agreed within 20 cm and 30 min, respectively. Whilst their observations have little scientific value today (other than indicating the quality attainable in the late 18th century), Bayly and Wales can not only rightfully lay claim to making New Zealand's first tide gauge measurements but also, as far as it possible to ascertain, be justifiably proud of the quality of their endeavours.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

43

Gledhill, Ken, John Ristau, Martin Reyners, Bill Fry und Caroline Holden. „The Darfield (Canterbury) earthquake of September 2010“. Bulletin of the New Zealand Society for Earthquake Engineering 43, Nr. 4 (31.12.2010): 215–21. http://dx.doi.org/10.5459/bnzsee.43.4.215-221.

Der volle Inhalt der Quelle

Annotation:

The Darfield moment magnitude (Mw) 7.1 earthquake of September 2010 is the first heavily damaging earthquake to strike New Zealand since the surface wave magnitude (MS) 7.8 Hawkes Bay earthquake in 1931. Although the earthquake has a clear strike-slip surface expression characterised by the Greendale Fault, seismological evidence suggests it is a complex event beginning as a reverse faulting earthquake. Evidence for complexity of the mainshock includes a well constrained epicentre north of the surface fault trace, high near-source vertical accelerations, first-motion and regional moment tensor focal mechanisms which differ from teleseismic solutions, and a complex aftershock pattern. The earthquake and aftershock sequence were very well recorded by the GeoNet sensor networks in the region, and provide an exceptional dataset for understanding the earthquake rupture process and reducing damage from future earthquakes. This was the most significant test of GeoNet since its inception in 2001, and the first such New Zealand event in the “internet age”. GeoNet data proved important for the response and the interaction with emergency management, media and the public. The GeoNet website sustained continued heavy load over the weeks and months following the earthquake but continued to deliver timely information because of significant improvements carried out as the aftershock sequence continued.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

44

Coppi, Gabriele, Simon Dicker, James E. Aguirre, Jason E. Austermann, James A. Beall, Susan E. Clark, Erin G. Cox et al. „The BLAST Observatory: A Sensitivity Study for Far-IR Balloon-borne Polarimeters“. Publications of the Astronomical Society of the Pacific 136, Nr. 3 (01.03.2024): 035003. http://dx.doi.org/10.1088/1538-3873/ad2e11.

Der volle Inhalt der Quelle

Annotation:

Abstract Sensitive wide-field observations of polarized thermal emission from interstellar dust grains will allow astronomers to address key outstanding questions about the life cycle of matter and energy driving the formation of stars and the evolution of galaxies. Stratospheric balloon-borne telescopes can map this polarized emission at far-infrared wavelengths near the peak of the dust thermal spectrum—wavelengths that are inaccessible from the ground. In this paper we address the sensitivity achievable by a Super Pressure Balloon polarimetry mission, using as an example the Balloon-borne Large Aperture Submillimeter Telescope (BLAST) Observatory. By launching from Wanaka, New Zealand, the BLAST Observatory can obtain a 30 days flight with excellent sky coverage—overcoming limitations of past experiments that suffered from short flight duration and/or launch sites with poor coverage of nearby star-forming regions. This proposed polarimetry mission will map large regions of the sky at sub-arcminute resolution, with simultaneous observations at 175, 250, and 350 μm, using a total of 8274 microwave kinetic inductance detectors. Here, we describe the scientific motivation for the BLAST Observatory, the proposed implementation, and the forecasting methods used to predict its sensitivity. We also compare our forecasted experiment sensitivity with other facilities.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

45

Watson, R. D., S. R. D. West, William Tobin und A. C. Gilmore. „CCD Photometry of the Eclipsing Binary HV 2274 in the Large Magellanic Cloud“. Symposium - International Astronomical Union 151 (1992): 509–13. http://dx.doi.org/10.1017/s0074180900122843.

Der volle Inhalt der Quelle

Annotation:

B, V and Ic photometry of the eclipsing binary HV 2274, located in the LMC, was obtained with the CCD system at the Mount John University Observatory, Lake Tekapo, New Zealand during 1990. Over 100 data points were acquired in each filter to an estimated precision of 0.02 mag. The flat maxima evident in the light curves suggest that the system, which is currently classed as an interacting candidate, should probably be considered as a detached one. A revised orbital period based on the inclusion of current data is presented. Eclipse timings indicate an eccentric orbit. An apsidal period in the vicinity of 120 yr is likely.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

46

McKenzie, Richard L., Paul V. Johnston, Dan Smale, Barry A. Bodhaine und Sasha Madronich. „Altitude effects on UV spectral irradiance deduced from measurements at Lauder, New Zealand, and at Mauna Loa Observatory, Hawaii“. Journal of Geophysical Research: Atmospheres 106, Nr. D19 (01.10.2001): 22845–60. http://dx.doi.org/10.1029/2001jd900135.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

47

Bayliss, T. J., und P. W. Burton. „A new earthquake catalogue for Bulgaria and the conterminous Balkan high hazard region“. Natural Hazards and Earth System Sciences 7, Nr. 3 (10.05.2007): 345–59. http://dx.doi.org/10.5194/nhess-7-345-2007.

Der volle Inhalt der Quelle

Annotation:

Abstract. A new homogenous earthquake catalogue covering Bulgaria and the surrounding Balkan area has been created with intention of performing a consistent seismic hazard assessment across the region. In keeping with modern requirements of cataloguing seismicity, this catalogue has been made homogenous as far as possible with regards to magnitude, which has been provided on any of four different reported scales for each event; mb, Ms, Mw and ML. A key historical catalogue for the region has been used to represent the early instrumental period of earthquake recording (1900 to 1963), whilst data have been obtained from the International Seismological Centre (ISC), National Earthquake Information Center (NEIC) and National Observatory of Athens (NOA) to cover the instrumental period of earthquake recording (1964 to 2004). ISC data have also been used to develop a new mb→Ms magnitude conversion equation for the catalogued region. Application of this new magnitude conversion relation, in combination with other selected magnitude scale correlations, ensures reported magnitudes can be systematically rendered onto homogenized Ms and Mw scales for all earthquakes. This catalogue contains 3681 events with homogenized magnitudes ≥4.0 Mw, for the time interval 1900 to 2004 (inclusive), located in the region bounded by 39°–45° N, 19°–29° E, at focal depths of 0.0 km to 401.0 km and in a magnitude range 4.0≤Mw≤7.2. Selected large magnitude (M≥6.0 Ms) earthquakes have had their reported magnitudes reassessed – and adjusted if necessary – in light of work by other authors. Applied statistical approaches aimed at determining the lower threshold to magnitude completeness suggest this catalogue is complete down to a homogenized surface-wave magnitude of 4.6 Ms.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

48

Fukui, A., F. Abe, I. A. Bond, K. Furusawa, J. B. Hearnshow, Y. Itow, K. Kamiya et al. „Transiting exo-planets search for MOA-I data“. Proceedings of the International Astronomical Union 4, S253 (Mai 2008): 366–69. http://dx.doi.org/10.1017/s1743921308026665.

Der volle Inhalt der Quelle

Annotation:

AbstractThe Microlensing Observations in Astrophysics (MOA) is a microlensing survey conducted at Mt. John Observatory in New Zealand. We searched transiting planet candidates from the MOA-I Galactic bulge data, which have been obtained with a 61cm B&C telescope from 2000 to 2005 for a microlensing search. Although this survey data were dedicated to microlensing, they are also quite useful for searching transiting objects because of the large number of stars monitored (~7 million) and the long span of the survey (~6 years). From our analysis, we found 58 transiting planet candidates. We are planning to follow up these candidates with high-precision spectroscopic and photometric observations for further selection, toward the detection of planets by radial velocity observations.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

49

Pollard, Karen R., E. Brunsden, M. Davie, A. Greenwood und P. L. Cottrell. „Spectroscopic mode identification of γ Doradus stars: frequencies, modes, rotation and wave leakage“. Proceedings of the International Astronomical Union 11, A29B (August 2015): 509–13. http://dx.doi.org/10.1017/s1743921316006001.

Der volle Inhalt der Quelle

Annotation:

AbstractThe gravity modes present in γ Doradus stars probe the deep stellar interiors and are thus of particular interest in asteroseismology. The MUSICIAN programme at the University of Canterbury has been successfully identifying frequencies and pulsation modes in many γ Doradus stars using hundreds of precise, high resolution spectroscopic observations obtained with the 1.0 m telescope and HERCULES spectrograph at the Mt John Observatory in New Zealand. In this paper we present a summary of our spectroscopic frequency and mode identifications. Of particular interest from our spectroscopic analyses are: the prevalence of (ℓ, m) = 1, 1 modes in many γ Dor stars; the importance of stellar rotation in the interpretation of the frequency and mode identification; and finally, possible evidence of wave leakage in one of these stars.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

50

Wardle, Mark. „Nautical Astronomy in New Zealand: The Voyages of James Cook Wayne Orchiston Carter Observatory, Wellington, 1998, 131 pp., RRP NZ$36.00“. Publications of the Astronomical Society of Australia 15, Nr. 3 (1998): 362. http://dx.doi.org/10.1017/s1323358000002320.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

Zeitschriftenartikel zum Thema „Seismological Observatory (New Zealand)“

Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an