Research on Seismic Calibration of the International Monitoring System in Northern Eurasia
SCIENCE APPLICATIONS INTERNATIONAL CORPSAN DIEGO CA
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The main goals of the Russian Seismoacoustic Research for CTBT Monitoring project were Calibration of seismic stations of the Russian Academy of Sciences RAS included in the International Monitoring System IMS, Development of travel time data for calibration studies in northern Eurasia, Collection data on peaceful nuclear explosions PNEs in the former Soviet Union, The Geophysical Survey GS of RAS and the Complex Seismological Expedition CSE of the Joint Institute of Physics of the Earth of the RAS, collected Northern Eurasian data on time arrivals for regional seismic phases. Tables for Pn, Pg, Sn and Lg waves have been updated. From travel-time residual analysis, we conclude that the LASPEI-91-91 predicted travel times are substantially biased in comparison with those predicted by Source Specific Station Corrections developed in this report. We review recently published and historical data on the parameters of PNEs in the former Soviet Union. The seismic locations of the International Seismological Center ISC for some PNEs show large misallocations greater than 101cm according to newly found information on these PNEs actual locations. For ISC estimates of origin times for some PNEs in the paper of Sultanov et. al., 1999, we provide adjusted data.