Important Upgrade of the ISC Bulletin and Associated Datasets

Session: Regional Earthquake Centers: Highlights and Challenges
Type: Oral
Date: 4/28/2020
Time: 03:00 PM
Room: 215 + 220
Description: 

The International Seismological Centre (ISC) produces the most long-term, comprehensive and homogeneous summary of instrumentally recorded seismicity on a global scale, primarily based on seismic bulletins from ~150 seismic networks worldwide. Several associated datasets and services such as the ISC-GEM, ISC-EHB, GT, the Event Bibliography and the ISC Seismological Dataset Repository further expand the ISC data for use in different research fields.

Recent upgrades include the releases of: rebuilt ISC Bulletin for the entire period since 1964, where all hypocentres and magnitudes have been recomputed using the current standard event location procedure (Bondar and Storchak, 2011), ak135 velocity model and all reported seismic phases; previously missing data from permanent and temporary deployments have been added and general cleaning of the Bulletin has been done; 7th version of the ISC-GEM catalogue most notably advanced with the earthquake mechanisms from scientific literature and continental earthquakes of smaller magnitudes; re-worked and enhanced ISC-EHB dataset for 1964-2016 period making the original EHB obsolete; ISC-authored fault plane solutions for moderate and large earthquakes that occurred during 1938-2016, this marked the beginning of routine use of freely available waveforms at the ISC to automatically determine and make available the polarities of first motions of P-waves and corresponding fault plane solutions, some of which are not given by other global or regional agencies; an additional set of near-source surface reflection arrival times (pP/sP/pwP) picked at the ISC to improve source depths in recent years of the ISC Bulletin, based on a globally distributed set of stations with waveforms available on-line; the ISC Seismological Dataset Repository - a new supplementary service that allows individual researchers to submit datasets to be openly available to the community long-term, this service is to assist a positive trend in scientific publishing that requires authors to make the original research data openly available.

Presenting Author: Dmitry A. Storchak

Authors