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[1]GAO Fanghong,LIU Zhikun,GENG Chuantao.Accurate Location of the 2020 Dongchuan,Yunnan ML4.2 Earthquake Sequence[J].Journal of Seismological Research,2022,45(01):48-53.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0006]

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Accurate Location of the 2020 Dongchuan,Yunnan M_L4.2 Earthquake Sequence

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 45 Number of periods: 2022 01 Page number: 48-53 Column: Public date: 2022-01-20

Title:: Accurate Location of the 2020 Dongchuan,Yunnan M_L4.2 Earthquake Sequence

Author(s):: GAO Fanghong; LIU Zhikun; GENG Chuantao; (School of Geophysics and Information Technology,China University of Geosciences,Beijing 100083,China)

Keywords:: earthquake location; microseismic detection; the Xiaojiang Fault Zone; double-difference earthquake location; pull-apart basin; Dongchuan M_L4.2 earthquake

CLC:: P315.73

DOI:: 10.20015/j.cnki.ISSN1000-0666.2022.0006

Abstract:: Selecting the continuous waveform data from 10 temporary broadband seismic stations in Dongchuan,Yunnan Province,and using the automatic seismic phase detection and correlation based on deep learning,we conduct absolute and relative locations of the July 8th,2020 Dongchuan M_L4.2 earthquake sequence,and obtain high-resolution results:the M_L4.2 earthquake sequence contains 212 events,about five times of the events from the catalogue of China Earthquake Networks Center,enriching the M_L<3.0 aftershocks.The focal depth of the M_L4.2 mainshock is 5.19 km and the aftershock sequence concentrates in the depth of 3—6 km.The Long axis of the aftershock zone is in the NNE direction.The earthquake sequence occurs in the west branch of the Xiaojiang Fault Zone and its seismogenic structure may be related with the tectonic evolution of the pull-apart Wulong Basin.

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Last Update: 2022-01-20