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[1]LIAO Shirong,YANG Ting,ZHANG Hongcai,et al.Fast Detection and Relocation of the 2021 Shuangbai MS5.1 Earthquake Sequences in Yunnan[J].Journal of Seismological Research,2021,44(04):515-520.

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Fast Detection and Relocation of the 2021 Shuangbai M_S5.1 Earthquake Sequences in Yunnan

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 44 Number of periods: 2021 04 Page number: 515-520 Column: Public date: 2021-11-10

Title:: Fast Detection and Relocation of the 2021 Shuangbai M_S5.1 Earthquake Sequences in Yunnan

Author(s):: LIAO Shirong¹; YANG Ting²; ZHANG Hongcai¹; 3; FAN Liping²; QIN Min⁴; FANG Lihua²; 5; 6; (1.Fujian Earthquake Agency,Fuzhou 350003,Fujian,China;2.Institute of Geophysics,China Earthquake Administration,Beijing 100081,China;3.Xiamen Institute of Marine Seismology,China Earthquake Administration,Xiamen 381000,Fujian,China;4.Yunnan Earthquake Agency,Kunming 650224,Yunnan,China;5.Key Laboratory of Earthquake Source Physics,China Earthquake Administration,Beijing 100081,China;6.Institute of Disaster Prevention,Sanhe 065201,Hebei,China)

Keywords:: the Shuangbai earthquake; deep learning earthquake detection; double difference location; seismogenic fault

CLC:: P315.6

DOI:: -

Abstract:: At 19:46 on June 10,2021,an M_S5.1 earthquake occurred in Shuangbai County,Yunnan Province,and another M_L4.6 earthquake succeeded on June 28.In this paper,the earthquake detection algorithm based on deep learning is used to detect the continuous seismic waveforms 20 days after the mainshock.Then,phase association,magnitude measurement,earthquake location and relocation are carried out,and a complete catalog of earthquake sequence is obtained.The sequence contains a total of 1 713 earthquakes,among which 623 more earthquakes are detected than by the manual method.The magnitudes(M_L)ranges from-0.8 to 5.1.The study shows that the aftershocks of the Shuangbai M_S5.1 earthquake and the M_L4.6 earthquake are generally distributed in NNE direction,and the seismogenic faults of the two earthquakes are steep and nearly vertical.The seismogenic fault is shallow in the northeast and deep in the southwest,and the fault plane is narrow.The aftershocks of the M_L4.6 earthquake are located below the aftershocks of the M_S5.1 earthquake; this indicates that the two main earthquakes may be independent events.The seismogenic fault of the two earthquake is a concealed,strike-slip fault located to the southwest of the Chuxiong-Jianshui fault.

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Last Update: 2021-11-10