|本期目录/Table of Contents|

[1]黎朕灵,金明培,缪素秋.2021年云南漾濞MS6.4地震同震位移场和震源滑动模型反演[J].地震研究,2021,44(03):330-337.
　LI Zhenling,JIN Mingpei,MIAO Suqiu.Slip Model and Co-seismic Displacement Field of the 2021 Yangbi,Yunnan MS6.4 Earthquake[J].Journal of Seismological Research,2021,44(03):330-337.
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2021年云南漾濞MS6.4地震同震位移场和震源滑动模型反演(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
44
期数:
2021年03期
页码:
330-337
栏目:
出版日期:
2021-10-20

文章信息/Info

Title:
Slip Model and Co-seismic Displacement Field of the 2021 Yangbi,Yunnan MS6.4 Earthquake
作者:
黎朕灵; 金明培; 缪素秋
(云南省地震局,云南 昆明 650224)
Author(s):
LI Zhenling; JIN Mingpei; MIAO Suqiu
(Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)
关键词:
近场强震记录;  基线校正;  GPS;  同震位移场;  InSAR;  震源滑动模型;  漾濞MS6.4地震
Keywords:
near-source strong motion;  automatic empirical baseline correction;  GPS;  co-seismic displacement;  slip model;  InSAR;  the Yangbi MS6.4 earthquake
分类号:
P315.72
DOI:
-
摘要:
基于2021年云南漾濞MS6.4地震震中周围40 km范围内仅有的2 个强震台近场强震记录进行基线校正并给出同震位移。同时分析强震和GPS资料呈现的永久位移场特征,利用快速获取的GPS同震位移场和InSAR 升、降轨资料分别独立和联合反演该地震的震源滑动模型,并进一步展现全空间预测位移场分布。结果表明:①漾濞地震水平同震位移场呈现以右旋走滑为主的错动。②GPS和InSAR独立和联合反演所得的震源静态滑动范围基本一致,均呈现单侧破裂的总体特征,即主要滑动均发生在震中东南部。6种模型的最大滑动量分别为0.74 m、0.66 m、0.44 m、0.45 m、0.47 m和0.47 m,反演的矩震级为MW5.9～6.3。③根据震源滑动模型正演所得的漾濞地震全空间预测水平同震位移场与实际观测位移场一致性较好,震中南、北两侧向内挤压,东、西两侧向外拉张,符合走滑型地震所产生的四象限位移场分布特征。
Abstract:
On the basis of the near-field strong motion records within 40 km around the epicenter of the Yangbi MS6.4 earthquake in Yunnan on May 21,2021,we used an improved automatic empirical baseline correction method to estimate the co-seismic displacement.We analyzed the characteristics of strong motion and GPS co-seismic displacement field.We inverted independently and jointly the source slip model using GPS data and InSAR ascending-and descending-orbit data,and further proposed the distribution of the predicted,full-space,co-seismic displacement field based on the slip model.The results showed that:(1)The horizontal co-seismic displacement field showed that the fault dislocation was dominated by right-lateral strike-slip.(2)The static slip range of the source obtained by independent-and joint-inversion of GPS and InSAR was basically the same.The maximum slip occurred in the south of the epicenter.The maximum slips of the source by the 6 models were respectively 0.74 m,0.66 m,0.44 m,0.45 m,0.47 m and 0.47 m.The inverted MW ranged from 5.9 to 6.3.(3)The predicted,full-space,horizontal,co-seismic displacement field of the Yangbi earthquake by the slip model was in good agreement with the observed,horizontal,co-seismic displacement field.The north and south parts of the epicenter were compressing inward,while the east and west parts were stretching outward.This was consistent with the characteristics of the co-seismic displacement field produced by a strike-slip earthquake.

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备注/Memo

备注/Memo:
收稿日期:2021-06-16
基金项目:国家重点研发计划子专题(2018YFC150330303)资助.

更新日期/Last Update: 2021-10-20