Recent Upgrade of the ISC Bulletin and Associated Datasets

Date: 4/26/2019

Time: 06:00 PM

Room: Grand Ballroom

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

Although the ISC data are not produced close to real time, they remain an important data source for calibration of real-time earthquake monitoring techniques and a good reference point for assessment of their results.

Recent upgrades included the releases of

- rebuilt ISC Bulletin for the 1964-1984 period, where all hypocentres and teleseismic 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;

- 6th 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 reviewed ISC-EHB dataset for 2000-2015;

- first ISC-authored set of fault plane solutions for moderate earthquakes that occurred during 1938-1979 and 2011-2016; this also 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.

Presenting Author: Dmitry A. Storchak

Authors