Seismic Characterization of Northeast Asia
Abstract
Our project of seismic characterization of northeast Asia continues on a multi-faceted approach concentrating on eastern Russia. The field work aspects of the project have included temporary station deployments, new permanent seismic station installations, and calibration of existing digital stations. Seismic station deployments include a 5 station temporary deployment in the Stanovoi Range in southern Yakutia/northern Amur region and two stations deployed in the vicinity of Yakutsk. The station deployments in the Stanovoi Range investigated the connection between a young volcanic field and a large cluster of poorly located historical seismicity and were the first ever seismic deployments in that region of eastern Russia. The volcanic field appears to be aseismic although surrounding areas were found to be very active, with more than 20 locatable local events per day recorded. We also mapped large scale active thrust faults in the region, which combined with observed seismicity will help us understand expected seismicity patterns, location quality, and tectonic models. We also are working on establishing 2 permanent stations in the Amur region and continue to work on station calibrations, with recent data acquired at Stekolnyi. Our Siberia database enhancements for this past year include (1) addition of new earthquakes and explosions and associated phase data, amplitudes, etc., primarily from the Irkutsk, Yakutsk, and Magadan networks for the years 1999-2006; (2) additions of amplitude data primarily from the Chukotka and Amur regions to aid amplitude tomography efforts; and (3) general quality control efforts primarily targeting unmerged, multi-author origins, the resolution of duplicated arrival information, and the inclusion of United States Geological Survey Earthquake Data Reports (USGS EDR) and International Seismological Centre (ISC) magnitudes for larger events where Russian network operators did not report a K-class or a magnitude estimate.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2007
- Accession Number
- ADA519472
Entities
People
- Charlotte A. Rowe
- Hans E. Hartse
- Kazuya Fujita
- Kevin G. Mackey
- Lee K. Steck
- Luiza Gutirrez
- Richard J. Stead
Organizations
- Michigan State University