The June 2022 Khost earthquake in southeastern Afghanistan:A complicated shallow slip event revealed with InSAR  

作　　者：Jiangtao Qiu Lingyun Ji Liangyu Zhu Chuanjin Liu Jinshuo Wang 

机构地区：[1]The Second Monitoring and Application Center,China Earthquake Administration,Xi'an,710054,China [2]Institute of Geology,China Earthquake Administration,Beijing 100029,China

出　　处：《Geodesy and Geodynamics》2023年第6期559-565,共7页大地测量与地球动力学（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.41874117)。

摘　　要：On June 22,2022,the Mw6.2 earthquake in southeastern Afghanistan caused a severe disaster.We used the Sentinel-1A ascending and descending track images of the European Space Agency and interferometric synthetic aperture radar(In SAR)to obtain the coseismic surface deformation field of the earthquake,which showed that the earthquake caused complex ruptures of multiple faults and various types.Using the dislocation model of the elastic half-space,we determined the focal parameters and slip distribution on the fault plane of this event.The results reveal that:(1)the seismogenic fault of this event is an unknown fault on the northeastern edge of the Katawaz microblock;(2)The slip on the fault plane is mainly in the range of 0—8 km along the dip,with maximum slips about 2 m at a depth of 2 km,which projected on the surface is 69.44°E,32.96°N.This event suggests that,similar to the Chaman,Ghazaband and other large faults,the faults inside the microblock also play an important role in adjusting for the collision stress between India and Europe.

关 键 词：2022 Afghanistan earthquake InSAR deformation Complex rupture Shallow slip 

分 类 号：P237[天文地球—摄影测量与遥感] P315.7[天文地球—测绘科学与技术]