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[1]HONG Min,ZHANG Yong,WANG Lingli,et al.Extraction of the Coordination Ratio Anomaly of the Cross-fault Disturbance and Its Efficiency Evaluation and Application in Yunnan[J].Journal of Seismological Research,2023,46(01):99-106.[doi:10.20015/j.cnki.ISSN1000-0666.2023.0008 ]

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Extraction of the Coordination Ratio Anomaly of the Cross-fault Disturbance and Its Efficiency Evaluation and Application in Yunnan

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 46 Number of periods: 2023 01 Page number: 99-106 Column: 地震地下流体监测预报理论及技术应用专栏 Public date: 2023-01-01

Title:: Extraction of the Coordination Ratio Anomaly of the Cross-fault Disturbance and Its Efficiency Evaluation and Application in Yunnan

Author(s):: HONG Min; ZHANG Yong; WANG Lingli; FU Hong; LI Libo; LIU Zifeng; (Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)

Keywords:: cross-fault; coordination ratio for disturbance; summary of earthquake samples; effectiveness evaluation; Yunnan area

CLC:: P315.2

DOI:: 10.20015/j.cnki.ISSN1000-0666.2023.0008

Abstract:: The identification and extraction of the anomalies from cross-fault monitoring have always been a problem for earthquake prediction.The coordination ratio method considers the inherent mechanism of the fault activity before the earthquake occurs,and has advantages in identification of earthquake anomalies.However,the coordination ratio method will give inconsistent results due to different zequines.In this paper,a new calculation method of coordination ratio for disturbance is proposed to characterize the possible disturbance of the regional stress field that may cause the fault's movement deviating from the background value before a strong earthquake,thus,to analyze the relation between the fault's movement with earthquakes.We take the cross-fault data at 11 observational sites in Yunnan,to retrospectively extract the comprehensive indicators for earthquake prediction for the historical M≥6.5 strong earthquakes in Sichuan and Yunnan.In this way,we get multiple indicators for earthquake prediction,and all of them have passed the efficacy test.The new method can help to identify the fault's abnormal movement and to extract indicators for the prediction of strong earthquakes.

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Last Update: 2023-01-01