Seismic anomalies analysis of 2 MS 5 earthquakes in Ningjiang District,Songyuan City,Jilin Province from 2018 to 2019
From 2018 to 2019,two earthquakes of M 5 or above occurred in Ningjiang District,Songyuan City,Jilin Province.Using seismological methods such as solid tide modulation ratio,b value,earthquake apparent stress and consistency of focal mechanism,the main seismological anomalies before the earthquakes were summarized and analyzed.The results show that before the two earthquakes,there were high anomalies in solid tide modulation ratio and earthquake apparent stress,low anomalies in b value,and the focal mechanism solutions showa good consistency,which indicates that these indicators have certain predictive significance for earthquakes of magnitude above 5.0 in Ningjiang area of Songyuan.
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