UNDERGROUND NUCLEAR EXPLOSIONS IN EASTERN SIBERIA AND THE SAKHA REPUBLIC: PRELIMINARY RESULTS OF SEISMOGRAM ANALYSIS BASED ON BAIKAL SEISMIC STATIONS NETWORK
https://doi.org/10.52676/1729-7885-2019-2-21-27
Abstract
During 1976–1987 in the former USSR on the territory of Irkutsk and Chita area (the Eastern Siberia) and Sakha Republic (Yakutia) ten peaceful nuclear explosions were conducted in scientific and commercial applications. The peaceful nuclear explosions have yields in the range of 3.2 to 15 kt. The events were registered by regional analog seismic stations network located in the Baikal rift system and surroundings at distances from 173 to 1407 km. The paper shows the first results of the treatment of these seismograms. Using arrival times, regional travel time curves for the both crustal and mantle seismic phases (Pn, Pg, Sn and Sg) were constructed and regional velocities of seismic waves were determined for the whole region and three main tectonic structures – Siberian platform, Baikal-Patom uplift and Transbaikal block. The velocities obtained well correlated with the data known on the velocity structure of the Earth’s crust and upper mantle of the Baikal rift system.
About the Authors
A. A. Dobrynina
Institute of the Earth’s Crust SB RAS; Geology Institute SB RAS
Russian Federation
Russian Federation
Irkutsk
Ulan-Ude
V. A. Sankov
Institute of the Earth’s Crust SB RAS; Irkutsk State University
Russian Federation
Irkutsk
Russian Federation
Irkutsk
V. V. Chechelnitskiy
Baikal Branch of Federal Research Center
“Unified Geophysical Survey RAS”
Russian Federation
Irkutsk
Russian Federation
Irkutsk
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Review
For citations:
Dobrynina A.A., Sankov V.A., Chechelnitskiy V.V. UNDERGROUND NUCLEAR EXPLOSIONS IN EASTERN SIBERIA AND THE SAKHA REPUBLIC: PRELIMINARY RESULTS OF SEISMOGRAM ANALYSIS BASED ON BAIKAL SEISMIC STATIONS NETWORK. NNC RK Bulletin. 2019;(2):21-27. (In Russ.) https://doi.org/10.52676/1729-7885-2019-2-21-27
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