Coseismic Slip Distribution of the 24 January 2020 Mw 6.7 Doganyol Earthquake and in Relation to the Foreshock and Aftershock Activities

作者：Xin Lin, Jinlai Hao, Dun Wang, Risheng Chu, Xiangfang Zeng, Jun Xie, Baolong Zhang, Qipeng Bai · 发表于：Seismological Research Letters · 年份：2020 · DOI：10.1785/0220200152 · 被引用次数：19 · 研究领域：earthquake and tectonic studies、High-pressure geophysics and materials、Earthquake Detection and Analysis

Abstract On 24 January 2020 (UTC), a destructive Mw 6.7 earthquake struck the east Anatolian fault of eastern Turkey after a series of foreshocks, causing many casualties and significant property damage. In this study, the rupture process of this earthquake is investigated with teleseismic broadband body-wave and surface-wave records. Results indicate that this earthquake is a left-lateral strike-slip event, and the rupture extends mainly to south. The main slip patch spreads ∼30 km along strike in the shallow above 14 km with a peak slip of ∼1.2 m, and the total seismic moment is 1.69×1019 N·m. The east–west component of horizontal surface displacement predicted with our slip model ranges from ∼0.4 to −0.3 m. The predicted displacements are consistent with the observed ones obtained from satellite images. We relocate 459 foreshocks and early aftershocks to explore the relationship between foreshock and aftershock sequences and coseismic slip. It is noted that there is an anticorrelation relationship between the distributions of early aftershocks and the coseismic slip. The strain energy in the large slip patch may have been sufficiently released by the mainshock; therefore, fewer early aftershocks occurred in that patch. Although we note a similar pattern between the relocated foreshock and coseismic slip, and a migration of foreshock, our dataset may not well resolve the correlation and migration due to the incomplete relocation foreshock catalog. Based on the slip model, w...