区域地震记录揭示的2023年甘肃积石山6.2级地震震源破裂过程

doi:10.12196/j.issn.1000-3274.2024.01.016

Abstract

Abstract: We carried out the inversion for finite-fault rupture process of the 2023 M6.2 Jishishan earthquake using the regional broadband seismic data. The result shows that the seismic fault of the Jishishan earthquake is thrust with slight strike-slip components. The rupture lasted about 9 s and the most seismic energy is mainly released within 6 s. The finite-fault slip model shows that the Jishishan earthquake rupture initiated from the hypocenter and expanded northwestward along the fault strike. The total seismic moment released by this fault is 1.39×10¹⁸ N·m equal to M_W6.02. The rupture length is about 10 km with a maximum coseismic slip of 35 cm.

Key words: The 2023 Jishishan M6.2 earthquake, Source rupture process, Slip distribution, Finite fault

CLC Number:

P315.7

LUO Yan, ZHU Yin-jie, GAO Yuan. Source Rupture Process of the 2023 M6.2 Jishishan, Gansu Earthquake Using the Regional Seismic Data[J]. EARTHQUAKE, 2024, 44(1): 189-194.

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Source Rupture Process of the 2023 M6.2 Jishishan, Gansu Earthquake Using the Regional Seismic Data

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