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[1]FU Hong,LIU Zifeng,HU Xiaojing,et al.Tracking Analysis of Seismic Anomalies of the 2021 Yangbi,Yunnan MS6.4 Earthquake[J].Journal of Seismological Research,2021,44(03):301-308.

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Tracking Analysis of Seismic Anomalies of the 2021 Yangbi,Yunnan M_S6.4 Earthquake

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 44 Number of periods: 2021 03 Page number: 301-308 Column: Public date: 2021-10-20

Title:: Tracking Analysis of Seismic Anomalies of the 2021 Yangbi,Yunnan M_S6.4 Earthquake

Author(s):: FU Hong; LIU Zifeng; HU Xiaojing; LI Zhirong; HONG Min; PENG Guanling; WANG Guangming; NI Zhe; (Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)

Keywords:: the Yangbi M_S6.4 earthquake; foreshock sequence; fixed survey of the crust deformation; underground-fluid anomalies; comprehensive prediction

CLC:: P315.72

DOI:: -

Abstract:: In this study,we made a series of researches and retrospections of the foreshock sequence,as well as the anomalies of seismological,deformation and fluid observations at fixed observational sites before the occurrence of the Yangbi M_S6.4 earthquake.The results are as follows:seismicity of the foreshock sequence is relatively complicated; some seismological anomalies can be extracted from the foreshock sequence.However,it’s difficult to make a short-term forecast based on the characteristics of the foreshock sequence.The anomalies of deformation at fixed observational sites arose early and substantially,which could shed light on the prediction of earthquake magnitude.The anomalies of fluid observation prior to the M_S6.4 earthquake were transient and intensive,which could provide better evidence for forecasting of the timing of the mainshock.Features of the anomalies of deformation and underground fluid are much similar in time and space with the features of the fault’s later-stage meta-instability,which may be because of the fault’s meta-instability evolution.One could improve the accuracy of the earthquake prediction by combining the characteristics of foreshock sequence and regional seismic risk.We suggested that it was a promising method for comprehensive earthquake prediction by reasonably using the characteristics of the anomalies emerged in different seismogenic stages.

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Last Update: 2021-10-20