| Abstract: | The results of deep seismic profiling through Southern Sakhalin, the southern Sea of Okhotsk, and the Southern Kuril Islands
allowed the identification of deep fault zones, the hypocenter locations, the features of the stress state, and the types
of seismic dislocations at the earthquake sources. The east side of the fault was upthrown relative to the west side beneath
the southern part of the Tatar Strait and Sakhalin Island and led, as a result of multiple thrusting events along the fault
over the geologic history, to the rise and 5-8 km displacement of the seismic boundaries. The true uplift of the Greater Kuril
arc block was determined using the focal mechanism solutions. The seismoctectonics and present-day dynamics of the crustal
blocks were estimated using a detailed joint analysis of the position of the structural boundaries at the seismic section
and the seismotectonic movements according to the earthquake focal mechanisms. |
