Seismic Characterization of Northeast Asia

Our project of seismic characterization of northeast Asia has continued on a multi-faceted approach concentrating on eastern Russia, including field deployments, data synthesis and interpretation, database integration, and travel-time tomography. For field efforts, we deployed four remote seismic st...

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Bibliographic Details
Main Authors: Mackey, Kevin, Steck, Lee, Fujita, Kazuya, Hartse, Hans, Stead, Richard
Other Authors: MICHIGAN STATE UNIV EAST LANSING
Format: Text
Language:English
Published: 2008
Subjects:
Seismology
*SEISMOLOGICAL STATIONS
*NORTHEAST ASIA
*SEISMOLOGY
SYNTHESIS
THRESHOLD EFFECTS
ALLUVIUM
BASE LINES
INTEGRATION
OPERATION
RUSSIA
TOMOGRAPHY
EARTHQUAKES
TRAVEL TIME
FAULTS
SURFACE TRUTH
SIBERIA
DETECTION
SATELLITE IMAGERY
DATA BASES
STATIONS
Buyunda
Magadan
Chersky
Kamchatka
Siberia
Online Access:http://www.dtic.mil/docs/citations/ADA516206
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA516206
Description
Summary:Our project of seismic characterization of northeast Asia has continued on a multi-faceted approach concentrating on eastern Russia, including field deployments, data synthesis and interpretation, database integration, and travel-time tomography. For field efforts, we deployed four remote seismic stations in the Seimchan-Buyunda basin in the Magadan region to get a better idea of baseline seismicity. Several events per day were recorded over approximately 40 days of station operation; the detection threshold for events was an order of magnitude higher than that of base stations in the cities. Suspected faulting-related geomorphological features observed in satellite images were also field checked along the Ulakhan Fault, a major earthquake generating feature, in this area. Fault scarps and sag ponds were identified cutting across a major alluvial fan. These dramatic features were previously undocumented and represent part of a major, but poorly understood fault system. This fault likely represents ground truth locations of earthquakes in the area. For data analysis efforts, we completed interpretation of earthquake records from seismic stations deployed in the Stanovoi Range in 2006, including the determination of a composite focal mechanism. Other data analysis included extending our focal mechanism compilation of eastern Siberia to northeast Kamchatka, and analysis of seismicity and mechanisms in the Karaginsky Island area. Finally, we also updated focal mechanism and seismicity compilations for the Chersky Range. Published in the Proceedings of the 30th Monitoring Research Review: Ground-Based Nuclear Explosion Monitoring Technologies, 23-25 Sep 2008, Portsmouth, VA sponsored by the National Nuclear Security Administration (NNSA) and the Air Force Research Laboratory (AFRL). The original document contains color images.

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