Abstract
We consider the April 27, 2014, Mw=4.9 Dzhirga earthquake, occurred within the north-eastern end of the Barguzin Depression. The event is the second one by energy level in the study area for the period of instrumental observations. The earthquake was followed by an aftershock sequence of 75 weak shocks recorded till the end of the year. The focal mechanism was determined from surface wave records from 13 digital broadband seismic stations of the IRIS networks. The obtained solution demonstrates the normal fault kinematics with both nodal planes striking north-east that corresponds to the regional fault pattern. The focal depth is estimated equal to 19 km. The maximum observed intensity was 5 points on the MSK-64 scale at the epicentral distance of 13 km. The Dzhirga earthquake analysis made it possible to fill in the lack of seismological information about the study area. The data obtained can be used for refinement of seismic hazard assessment of the north of the Barguzin Basin.
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