[1]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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Slip Model and Co-seismic Displacement Field of the 2021 Yangbi,Yunnan MS6.4 Earthquake
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
44
Number of periods:
2021 03
Page number:
330-337
Column:
Public date:
2021-10-20
- Title:
- Slip Model and Co-seismic Displacement Field of the 2021 Yangbi,Yunnan MS6.4 Earthquake
- Keywords:
- near-source strong motion; automatic empirical baseline correction; GPS; co-seismic displacement; slip model; InSAR; the Yangbi MS6.4 earthquake
- CLC:
- P315.72
- DOI:
- -
- 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.
- References:
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Last Update:
2021-10-20