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.Asthenosphe...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.展开更多
基金the Russian Foundation for Basic Research for financial support of our research work(RFBR Project No:12-05-00029-a).
文摘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.
