Coseismic Deformations of the Earth's Surface in Sakhalin Related to the August 2, 2007, M-w=6.2 Nevelsk Earthquake

摘要

The satellite radiointerferometry data revealed deformations of the coastal part of Sakhalin Island caused by the earthquake with M-w = 6.2 that occurred in the Tatar Strait near Nevelsk. Based on the joint analysis of the satellite and seismological data, dislocation models were contrived for the main shock and its strong aftershocks with the western dip of the fault planes. This made it possible to determine the source mechanisms and the geometrical parameters of the seismic ruptures and to calculate the coseismic vertical and horizontal displacements. In contrast to the one-dimensional model of the insular land displacements determined from the satellite radiointerferometry measurements, this provided a three-dimensional model of the surface deformations for the epicentral zone.