Geological-geophysical model of northeastern Kamchatka with a reference to a seismic activity of the region in 2013
The results of the geophysical studies of the Earth crust and upper mantle carried out in 2000-2013 in the area of the Isthmus of Kamchatka were analyzed. On basis of the data obtained the obduction - the thrust of the sub-oceanic lithosphere onto the marginal part of the continental lithosphere was marked. The obtained materials indicate a potentially high seismic hazard of the entire frontal zone of the obduction. A complex geological and geophysical model was developed along the profile passing along the obduction front between Ossora and Tilichiki villages. In 2013 a powerful seismic activity in the northeast of the region was registered. This activization began with the Il'pyr earthquake. The comparison of the simulation results with the seismic lineament shows that along the fractures between lithospheric blocks there is a tectonic stress accumulation with their further discharge as seismic events. It was recorded at the site of the obduction between the Ossora and Tilichiki villages in March-May, 2013.