The IASPEI Standard Seismic Phase List

Storchak, Dmitry A.; Schweitzer, Johannes; Bormann, Peter

doi:10.1785/gssrl.74.6.761

Cited by 82 publications

(40 citation statements)

References 11 publications

(7 reference statements)

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“…Many of the phases have become compliant with the IASPEI Standard Seismic Phase List (Storchak et al 2003. Nevertheless, several hundreds of distinct phase names (small percentage in terms of the corresponding total number of phase reports) are still not Fig.…”

Section: Correcting Seismic Phase Namesmentioning

confidence: 99%

“…As previously explained, relocation of selected events has been made using the new standard earthquake locator (Bondár and Storchak 2011), ak135 velocity model (Kennett et al 1995) and the uniform set of seismic phases (Storchak et al 2003). Location error ellipse parameters have been computed for all ISC hypocentres.…”

Section: Selection Of Events For Isc Relocation and Analyst Reviewmentioning

confidence: 99%

“…The list of recognised seismic phase names has changed with each edition of the manual of seismological observatory practice (Willmore and Karnik 1971;Willmore 1979;Bormann 2002Bormann , 2012. From data year 2009, the ISC used in location all standard seismic phases (Storchak et al 2003 for which the arrival times can be calculated.…”

Section: Introductionmentioning

confidence: 99%

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Rebuild of the Bulletin of the International Seismological Centre (ISC), part 1: 1964–1979

Storchak¹,

Harris²,

Brown³

et al. 2017

Geosci. Lett.

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The data from the Bulletin of the International Seismological Centre (ISC) have always been and still remain in demand for a wide range of studies in Geosciences. The unique features of the Bulletin include long-term coverage (1904-present), the most comprehensive set of included seismic data from the majority of permanent seismic networks at any given time in the history of instrumental recording (currently ~ 150) and homogeneity of the data and their representation. In order to preserve this homogeneity, the ISC has followed its own standard seismic event processing procedures that have not substantially changed until the early 2000s. Several considerable and necessary advancements in the ISC data collection and seismic event location procedures have created a need to rebuild the data for preceding years in line with the new procedures. Thus was set up a project to rebuild the ISC Bulletin for the period from the beginning of the ISC data till the end of data year 2010. The project is known as the Rebuild of the ISC Bulletin. From data month of January 2011, the ISC data have already been processed with the fully tested and established new procedures and do not require an alteration. It was inconceivable even to think about such a project for many tens of years, but great advances in computer power and increased support by the ISC MemberInstitutions and Sponsors have given us a chance to perform this project. Having obtained a lot of experience on the way, we believe that within a few years the entire period of the ISC data will be reprocessed and extended for the entire period of instrumental seismological recordings from 1904 till present. The purpose of this article is to describe the work on reprocessing the ISC Bulletin data under the Rebuild project. We also announce the release of the rebuilt ISC Bulletin for the period 1964-1979 with all seismic events reprocessed and relocated in line with the modern ISC procedures, ~ 68,000 new events, 255 new stations, ~ 815,000 new seismic phases, more robust and reliable mb and M S magnitude evaluations and the addition of ~ 2700 new M S magnitudes.

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Section: Correcting Seismic Phase Namesmentioning

confidence: 99%

Section: Selection Of Events For Isc Relocation and Analyst Reviewmentioning

confidence: 99%

See 1 more Smart Citation

Rebuild of the Bulletin of the International Seismological Centre (ISC), part 1: 1964–1979

Storchak¹,

Harris²,

Brown³

et al. 2017

Geosci. Lett.

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“…6 are between 50 and 300 km of all possible source locations and the exact nature of the first arriving regional P and S phases will depend upon source-receiver distance and the local crustal structure. It is rarely possible to identify an initial regional P arrival as a Pn or Pg phase (see STORCHAK et al, 2003) at these distances and so we exploit the option in HYPOSAT which allows an unidentified first regional P or S arrival to be labelled P1 or S1. HYPOSAT revises the phase identification attributed at each iteration, depending upon the source-receiver distances for the most recent location estimate.…”

Section: Event Location Estimatesmentioning

confidence: 99%

Detection and Analysis of Near-Surface Explosions on the Kola Peninsula

Gibbons

Ringdal

2009

Pure Appl. Geophys.

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Seismic and infrasonic observations of signals from a sequence of near-surface explosions at a site on the Kola Peninsula have been analyzed. NORSAR's automatic network processing of these events shows a significant scatter in the location estimates and, to improve the automatic classification of the events, we have performed full waveform cross-correlation on the data set. Although the signals from the different events share many characteristics, the waveforms do not exhibit a ripple-for-ripple correspondence and cross-correlation does not result in the classic delta-function indicative of repeating signals. Using recordings from the ARCES seismic array (250 km W of the events), we find that a correlation detector on a single channel or three-component station would not be able to detect subsequent events from this source without an unacceptable false alarm rate. However, performing the correlation on each channel of the full ARCES array, and stacking the resulting traces, generates a correlation detection statistic with a suppressed background level which is exceeded by many times its standard deviation on only very few occasions. Performing f-k analysis on the individual correlation coefficient traces, and rejecting detections indicating a non-zero slowness vector, results in a detection list with essentially no false alarms. Applying the algorithm to 8 years of continuous ARCES data identified over 350 events which we confidently assign to this sequence. The large event population provides additional confidence in relative travel-time estimates and this, together with the occurrence of many events between 2002 and 2004 when a temporary network was deployed in the region, reduces the variability in location estimates. The best seismic location estimate, incorporating phase information for many hundreds of events, is consistent with backazimuth measurements for infrasound arrivals at several stations at regional distances. At Lycksele, 800 km SW of the events, as well as at ARCES, infrasound is detected for most of the events in the summer and for few in the winter. At Apatity, some 230 km S of the estimated source location, infrasound is detected for most events. As a first step to providing a Ground Truth database for this useful source of infrasound, we provide the times of explosions for over 50 events spanning 1 year.

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“…Data nomenclature, seismic phase name prerogatives, earthquake information definition, and magnitude computation are defined following the IASPEI standards (Bormann 2002;Storchak et al 2003; the full description of the IASPEI seismic format is available at http://www.isc.ac.uk/documents/isf.pdf). Gathering the data from several networks requires international collaboration in terms of electronic exchange, data format, and periodicity.…”

Section: Data Collection Parsing and Accessmentioning

confidence: 99%