CHARACTERISTICS ANALYSIS OF GEOELECTRIC DOMINANT AZIMUTH CHANGES IN XINJIANG BEFORE WUSHI MS7.1 EARTHQUAKE ON JANUARY 23,2024
Based on the retrospective analysis of the observation data of five geoelectric stations in Xinjiang before the Wushi MS7.1 earthquake on January 23,2024,the geoelectric dominant azimuth of each station before the earthquake is calculated,and the data variation characteristics are summa-rized.It is found that the geoelectric dominant azimuth of each station before the earthquake has dif-ferent degrees of abnormal changes,and the anomalies are characterized by dispersion,concentra-tion,deflection and jump.The geoelectric dominant azimuth anomalies of Wushi and Wenquan sta-tions near the epicenter have quasi-synchronous changes in time.Before the earthquake,the Wushi,Wenquan and Hetian stations within 500 km of the epicenter not only had quasi-synchronous decline in the correlation coefficient between different azimuths,but also had similar linear polarization en-hancement in the polarization azimuth,and the abnormal changes of the dominant azimuth of Wushi and Hetian stations showed the phenomenon of concentration to the principal compressive stress P,indicating that the changes of geoelectric data observed by Wushi,Wenquan and Hetian stations be-fore the Wushi MS7.1 earthquake had a certain mechanism connection with the earthquake.
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万方数据
