2020年唐山5.1级地震发震背景分析

doi:10.12196/j.issn.1000-3274.2023.04.003

Abstract

Abstract: More than 40 years after the 1976 Tangshan earthquake of M7.8, an M5.1 earthquake still occurred on July 12, 2020 in Guye located at the northeast end of Tangshan fault. In this paper, the multiple seismogenic background of this earthquake is analyzed by combining the tectonic background, the space-time image of many small earthquakes, the result of focal mechanism solution of many earthquakes, on-site investigation and other data as well as previous research results. The results show that the seismic fault is the Mozhouyu fault which is conjugated with Tangshan fault zone, and there still exists a certain risk for future earthquake occurrence in this area. Through this study, a new understanding of seismogenic tectonic background in the old Tangshan seismic area has been obtained.

Key words: The 2020 Tangshan M5.1 earthquake, Seismogenic background, Focal mechanism

CLC Number:

P315.7

TANG Jie, ZHANG Su-xin, FENG Xiang-dong, SUN Li-na, WANG Xiao-shan, BIAN Qing-kai. The Seismogenic Background of the 2020 Tangshan M5.1 Earthquake[J]. EARTHQUAKE, 2023, 43(4): 37-49.

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The Seismogenic Background of the 2020 Tangshan M5.1 Earthquake

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