Seismic Location Calibration for 30 International Monitoring System Stations In Eastern Asia
Abstract
We review the progress of a collaborative academic-industry research consortium, comprised of five institutions, that has started an integrated series of projects to improve the capability to locate seismic events based on data acquired by International Monitoring System (IMS) stations in Eastern Asia. This effort is to develop and deliver validated high-resolution travel time grids for operational use. During the first year of work we have focused on IMS stations in Central Asia and Northern Pakistan, specifically the stations MAK, BRVK, KURK, AAK, AKTO, ZAL, PRPK/NIL, for which we are obtaining preliminary Source Specific Station Corrections (SSSCs). Each station presents its special problems and opportunities. Thus, although only two of these stations (ZAL and NIL) are currently contributing data to the International Data Centre (IDC), we have broadband high-quality data from surrogate stations at or close to the planned IMS sites for the other five sites. In joint projects with the National Nuclear Centre of the Republic of Kazakhstan (NNCRK) and the Institute of Dynamics of the Geosphere of the Russian Academy of Sciences, regional waveforms from Borovoye (BRVK) have become available for 80 Soviet PNEs, 228 Semipalatinsk explosions and 11 Lop Nor explosions. In a joint project with the NNCRK and the Complex Seismological Expedition based in Talgar, Kazakhstan, regional waveforms from 37 Soviet Peaceful Nuclear Explosions (PNEs) have become available for several other stations in Central Asia. Since 1994 we have operated broadband instrumentation jointly with the NNCRK at MAK, BRVK, KURK, and AKTO enabling, for example, the recording of regional waves from numerous earthquakes throughout Central Asia, and some nuclear explosions (Lop Nor). We have obtained empirical travel times from all these datasets, using published high-quality ground truth information for the Soviet PNEs. Other valuable sources of empirical travel time information have been the Deep Seismic
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2001
- Accession Number
- ADA515053
Entities
People
- Clint Conrad
- D. P. Schaff
- Elena Morozova
- Felix Waldhauser
- Igor Morozov
- Mark Fisk
- Paul G. Richards
- Vitaly I. Khalturin
- Won-Young Kim
Organizations
- Lamont–Doherty Earth Observatory