Приамурье и Приморье

Abstract

The review of seismicity of Amur and Primorye in 2013 according to the data of permanent seismic sta-tions’s network of the Sakhalin branch of the GS RAS is presented. Maps of the representative registration of earthquakes (Mmin), of epicenters of earthquakes and explosions are presented. Distributions of shallow earthquakes by T.G. Rautian energy classes КR, and of deep-focused by magnitude MPVA are shown; total amount of seismic energy released in six seismoactive areas is given. The results of observations of after-shock activity of Skovorodino earthquake on October 14, 2011 (M=6.2) are presented. Seismicity recorded in 2013 is compared with the results of long-term observations. In general, the seismic regime of the Pri-amurye and Primorye region in 2013 is identical to that in 2012. The Turano-Bureinsky district (No. 4) con-tinues to be the dominant region in terms of released seismic energy of crustal earthquakes, which is similar to the previous year. The more stable operation of seismic stations in 2013 had a positive effect on the quality of seismic events in the catalog. There is a noticeable shortage of small events in the catalog (with КР≤6.5) despite this. This is mostly relevant to Stanovoy District No. 1 and Yankan-Tukuringra-Dzhagdinsky No. 2 regions. There was a significant increase in the total amount of released seismic energy of deep-focus earthquakes in the Sikhote-Alin area No. 5 in 2013. The peculiarity of 2013 was a slight in-crease in the number of recorded technogenic events, the largest of which are located on the territory of northern China. In most parts of the Amur and Primorye region the level of seismic activity in 2013 re-mained moderate.