摘要
利用欧空局Sentinel-1A卫星的升轨观测,基于InSAR技术获取2016-10-17青海杂多地区MS6.2地震的同震形变场,并分别采用最速降法和三角元法反演地震的位错分布模型。结果表明,本次地震发生在杂多上拉秀断裂带,走向北东东,地震破裂以正断倾滑为主,兼具少许左旋走滑运动分量,最大滑移量0.17m,震源深度为9km,平均滑动角约为-76°,最大形变中心位于32.85°N、94.86°E附近,地震位错主要分布在深度8~12km,与余震的深度分布较为一致,反演给出的矩震级为MW5.9,与USGS和CENC测定的矩震级和面波震级基本一致。
We determine the coseismic displacement of the Qinghai Zadoi MS6.2 earthquake that occurred on October 17,2016 using ascending InSAR data from the ESA＇s Sentinel-1 Asatellite,and we obtain the fault distribution of the earthquake using the SDM method.The results show that there is large dip-slip in the fault concentrating in the depth between 8 km and 12 km,with a little strike-slip component.The maximum slip of 0.17 mis observed at a depth of 9 km and is located near 32.85°N,94.86°E.The obtained focal depth is consistent with the aftershock and the inverted seismic magnitude is MW5.9,which is consistent with the USGS and CENC.
作者
陈威
余鹏飞
熊维
林牧
CHEN Wei;YU Pengfei;XIONG Wei;LIN Mu(Key Laboratory of Earthquake Geodesy, Institute of Seismology, CEA, 40 Hongshance Road, Wuhan 430071, China;Wuhan Base of Institute of Crustal Dynamics, CEA,40 Hongshance Road,Wuhan 430071,China)
出处
《大地测量与地球动力学》
CSCD
北大核心
2018年第7期738-742,共5页
Journal of Geodesy and Geodynamics
基金
中国地震局地震科技星火计划(XH17023Y)~~
关键词
杂多地震
INSAR
同震形变
滑动分布
Zadoi earthquake
InSAR
eoseismic deformation
fault slip distribution
