Abstract：Based on data from 11 cross-fault sites in Yunnan province, applying the cross-fault data analysis method, this paper systematically summarizes and extracts the comprehensive seismic prediction indexes in Yunnan province. By analyzing and summarizing the response ability of these indexes before the Yangbi M6.4 earthquake, the preliminary conclusion is that there is a significant mid-term anomaly in the cross-fault data before the Yangbi M6.4 earthquake, and that the occurrence of the earthquake may be related to the increase in activity of the western boundary of the Sichuan-Yunnan diamond block. The cross-fault mid-term prediction index makes a good estimate for the Yangbi M6.4 earthquake. Short-term indicators also pass the effectiveness criterion, but forecast effectiveness is slightly worse. Therefore, in the subsequent analysis of cross-fault data, more attention should be paid to the extraction and application of medium-term anomalies and medium-term prediction indexes. The comprehensive indexes summarized in this paper can be applied to follow-up earthquake situation tracking in Yunnan area.
WANG Lingli,HONG Min,ZHANG Yong et al. Seismogenic Background Analysis and Cross-Fault Quantitative AbnormalIndex Extraction for the M6.4 Yangbi Earthquake[J]. jgg, 2022, 42(8): 802-807.
