The relation of seismicity to the deep geological structure of the Russian Amur area and Northeast China

At the comparison of magnitudes and the depth earthquake distributions with a deep geological structure the dependence of extensiveness of seismic processes on the tectonic media rigidity in the crust and upper mantle of the Priamurie and Northeast China is revealed and described in the 3D-space. Distribution of magnitudes and a density of earthquakes is characterized by clearly expressed discrete-type behavior in intervals of depths: 10-15, 30-60 and 200-220 km. In the earth's crust and upper mantle in the depth interval of 20-60 km the linear zone of lowered seismicity coinciding with the Mesozoic position of the Tanlu rift zone, zones of lowered electric resistance and lithosphere thickening has been established. Isometric anomaly of lower seismicity in the Middle Amur Area into the low crust layer within the Maya-Selemdza Plume Head is revealed. This anomaly coincides with the low electric resistance, absorption of seismic waves, and partial melting zones.