[1]ZHAO Xiaoyan,WANG Guangming,ZHANG Qian,et al.Characteristics of the 2021 Yangbi,Yunnan MS6.4 Earthquake Sequence and Prediction of Its Strong Aftershocks[J].Journal of Seismological Research,2021,44(03):309-319.
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Characteristics of the 2021 Yangbi,Yunnan MS6.4 Earthquake Sequence and Prediction of Its Strong Aftershocks
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
44
Number of periods:
2021 03
Page number:
309-319
Column:
Public date:
2021-10-20
- Title:
- Characteristics of the 2021 Yangbi,Yunnan MS6.4 Earthquake Sequence and Prediction of Its Strong Aftershocks
- CLC:
- P315.72
- DOI:
- -
- Abstract:
- On the basis of the data of the 2021 Yangbi MS6.4 earthquake sequence recorded by the Yunnan Earthquake Observation Network,we analyze the temporal and spatial evolution characteristics of the sequence.The spatial distribution of the sequence can be divided into 4 sections and the aftershock-activity attenuate rapidly.Through the analysis of the type of the historical earthquake sequences in this area,the method of h-value,the method of dt-t,the method of the cumulative frequency,and first-motion signs of the earthquake wave,we determine that the Yangbi MS6.4 earthquake sequence belongs to foreshock-mainshock-aftershock type.According to the statistics of the original time of the historical strongest aftershocks in Yunnan,and the distribution characteristics of the magnitude differences,we conclude that the strongest aftershock of the Yangbi MS6.4 earthquake has occurred.Finally we discuss the high frequency of ML≥4.0 aftershocks in the sequence and the possible reasons.
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Last Update:
2021-10-20