Intraplate Earthquakes and State of Stress in the former Soviet Union.

Information on intraplate earthquakes in the Former Soviet Union and adjacent regions is collected from historical and instrumental records. Since most of the territory of the Russian Republic is intraplate in its tectonic character, intraplate earthquakes and the stresses that generate them are of...

Full description

Bibliographic Details
Main Authors: Sykes, Lynn R., Yunga, Sergey, Rautian, Tatiana
Other Authors: COLUMBIA UNIV NEW YORK
Format: Text
Language:English
Published: 1998
Subjects:
Seismology
*USSR
*STRESS ANALYSIS
*EARTHQUAKES
*SEISMOLOGY
STRESSES
STRESS STRAIN RELATIONS
TECTONICS
STRESS CONCENTRATION
CTBT(COMPREHENSIVE TEST BAN TREATY)
INTRAPLATE EARTHQUAKES
Kama
Kara Sea
Online Access:http://www.dtic.mil/docs/citations/ADA356442
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA356442
Description
Summary:Information on intraplate earthquakes in the Former Soviet Union and adjacent regions is collected from historical and instrumental records. Since most of the territory of the Russian Republic is intraplate in its tectonic character, intraplate earthquakes and the stresses that generate them are of importance to the monitoring of the Comprehensive Test Ban Treaty (CTBT). Data from a number of catalogs are merged so as to study locations and sizes of intraplate shocks and their tectonic setting in Russia, Belarus, Ukraine, Kazakhstan and the Baltic states. In these areas intraplate activity is generally highest in regions 100 to 300 km wide adjacent to the more active plate boundaries in the Carpathian, Caucasus and Kopet Dag mountains and, hence, drops off gradually rather than suddenly in space. In contrast, earthquake activity drops off very abruptly to the north and northwest of the active zone along Lake Baikal. An east-striking zone of intraplate activity about 700 km long near 560 N between 430 and 540 E, which coincides with portions of the Volga and Kama rivers of the same strike, is delineated for the first time. As in North America some intraplate areas of Eurasia are characterized by very low rates of known seismic activity. The seismic event of August 16, 1997 in the Kara Sea, a small intraplate earthquake of magnitude 3.2, was studied extensively. A few new directions of principle stresses are obtained for intraplate areas of the Russian Republic.

Similar Items