[1]HE Suge,ZHOU Qingyun,LIU Zifeng.Seismogenic Structure of the 2021 Yangbi,Yunnan MS6.4 Earthquake and Earthquake Risk Analysis in the Epicenter Area[J].Journal of Seismological Research,2021,44(03):380-390.
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Seismogenic Structure of the 2021 Yangbi,Yunnan MS6.4 Earthquake and Earthquake Risk Analysis in the Epicenter Area
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
44
Number of periods:
2021 03
Page number:
380-390
Column:
Public date:
2021-10-20
- Title:
- Seismogenic Structure of the 2021 Yangbi,Yunnan MS6.4 Earthquake and Earthquake Risk Analysis in the Epicenter Area
- CLC:
- P315.2
- DOI:
- -
- Abstract:
- The 2021 Yangbi MS6.4 earthquake is the first M≥6 event since the 2014 Jinggu MS6.6 earthquake in Yunnan Province.Through field investigation of the Yangbi earthquake,along with its focal mechanism and aftershocks’ distribution,we considered that the seismogenic fault of this earthquake is not the Weixi-Qiaohou Fault,but a NW trending buried fault.According to the collected data of active faults,b-value,P-wave velocity and slip rate of the faults in the deep around the epicenter,we assessed the seismic risk in Yangbi area and its vicinity.We concluded that the Yangbi earthquake occurred in the low P-wave velocity area,so it is less likely to form a larger earthquake in this area in the future.The north and south segments of the Weixi-Qiaohou Fault are of great differences,The activity of the south segment is relatively weak.The high earthquake risk zones in the Yangbi area are Qiaohou Town and its nearby areas in the South of the Longpan-Qiaohou Fault,and the Western Heqing County in the southwest section of the Lijiang-Xiaojinhe Fault,which should be paid more attention to in the future.
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2021-10-20