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[1]YUAN Fuquan,HUANG Hao,CAI Liwen,et al.Determination of the Focal Mechanism and Focal Depth of the Xiahe, Gansu MS5.7 Earthquake in 2019[J].Journal of Seismological Research,2021,44(04):521-528.

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Determination of the Focal Mechanism and Focal Depth of the Xiahe, Gansu M_S5.7 Earthquake in 2019

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 44 Number of periods: 2021 04 Page number: 521-528 Column: Public date: 2021-11-10

Title:: Determination of the Focal Mechanism and Focal Depth of the Xiahe, Gansu M_S5.7 Earthquake in 2019

Author(s):: YUAN Fuquan¹; HUANG Hao¹; CAI Liwen¹; LI Qilei¹; ZHAO Yanjie¹; LIU Xingsheng²; (1.Qinghai Earthquake Agency,Xining 810001,Qinghai,China;2.Emergency Management Department of Qinghai Province,Xining 810001,Qinghai,China)

Keywords:: the Xiahe earthquake; CAP method; focal depth; time-reversal imaging technique

CLC:: P315.3

DOI:: -

Abstract:: In order to accurately determine the focal depth of the Xiahe,Gansu M_S5.7 earthquake,we used the broadband waveforms from Qinghai Seismic Networks,Gansu Seismic Networks and Sichuan Seismic Networks to invert the focal mechanism of this earthquake on the basis of Cut-and-Paste(CAP)method and the regional velocity model.We further delimited the earthquake’s depth by the time-reversal imaging technique.We find that this earthquake is a thrust and strike slip one,and its focal depth is about 5 km.And its seismogenic fault is the Xiahe fault,which is newly discovered by remote sensing interpretation and field investigation,i.e.the planeⅠ(strike 305°/dips 52°/rake 50°)could be the seismogenic fault.

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Last Update: 2021-11-10