Abstract:The time, magnitude and epicenter of the Tangshan M5.1 earthquake on July 12, 2020 are all consistent with the prediction of China electromagnetic mid-year consultation on May 22, 2020. Before the earthquake, according to the “practical handbook of earthquake electromagnetic analysis and prediction methods” and the “manual on technical methods of earthquake electromagnetic analysis and prediction”, the electromagnetic group analysed the data of electromagnetic stations in the mainland of China. The results show that there are many anomalies such as daily variation of geomagnetism, harmonic amplitude ratio, and geoelectric field at the electromagnetic stations in the capital circle. The comprehensive prediction before the earthquake is basically consistent with the actual earthquake. The prediction index system construction of geo-electromagnetic discipline from 2016 to 2019 has achieved initial results.
DAI Miao,FENG Zhisheng,LIU Jian et al. Comprehensive Analysis of Electromagnetic Data before Tangshan M5.1 Earthquake in July 2020[J]. jgg, 2021, 41(11): 1146-1151.