Abstract
The deep structure of the Sea of Okhotsk under seismically dangerous regions is studied. The main feature of the deep structure in the region is the occurrence of an asthenospheric layer in the upper mantle. Asthenospheric diapirs can effectively rise through the crust, causing destruction of the lithosphere, formation of deep basins, faults and rifts accompanied by shallow-focus earthquakes, and eruptions of volcanoes. The vast majority of earthquakes are confined to the Kuril Island Arc, where the Pacific Plate is subducted under the continent. The seismicity in the region is a result of active tectonics in the subduction zone. This zone is traced to a depth of 700 km. In the west, the Okhotsk Sea Region is bounded by the deep faults extending along Sakhalin, where earthquakes are localized in the crust. The ancient subduction zone under Sakhalin is established. In the late Cretaceous to Paleogene the subduction of the Okhotsk Sea Plate under Sakhalin ceased. The reactivation of this ancient subduction zone may currently be in response to the strong earthquakes in Sakhalin.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
