Spatial heterogenity of slip on finite faults in the Kuril-Kamchatka Segment of the Pacific subduction zone

Abstract

The study aims at gathering detailed information on source-related seismic radiation patterns in the interaction zone of Pacific and North American lithospheric plates (the Kuril-Kamchatka segment). To achieve our goals we have developed a program capable of mapping zones of relatively high slip and assessing their area based on GIS data. We have analyzed the asperity distribution on a fault planes. A stochastic model of subduction-related interplate earthquakes has been proposed in the framework of fragmentary-based source model. The obtained results can further be used in a stochastic simulation of a catalogue of finite faults for the Japan- Kuril-Kamchatka island arc.