THE Ms = 7.0 UUREG NUUR EARTHQUAKE OF 15.05.1970 ( Mongolian Altai ): THE AFTERSHOCK PROCESS AND CURRENT SEISMICITY IN THE EPICENTRAL AREA
A.F. Emanova,b, A.A. Emanova,b, E.V. Leskovaa,b, Yu.I. Kolesnikovb, V.V. Yankaitisa, and A.G. Filinaa
aSB RAS Geophysical Survey, Altai-Sayan Branch, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
bA.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
Keywords: Seismology, Uureg Nuur earthquake, aftershocks, Mongolian Altai
Pages: 1090-1099
Abstract
The aftershock process induced by the Ms = 7.0 Uureg Nuur earthquake, one of the largest events in the Altai, has been studied comprehensively. As an additional experiment, a temporary local network of seismic stations was deployed in 2006 in the epicentral area of the earthquake to gain more insights into the current tectonic activity. The aftershocks of the Uureg Nuur event were restricted to small faults in the interior of fault blocks rather than those being localized along border faults. Seismic activity across the directions of large faults has apparently been generated by a fault (in the Tsagaan Shuvuut Range) reactivated during the Uureg Nuur earthquake. The aftershock process, at its final phase, involved an adjacent crust block.
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