四川地区大气静电场的地震信息研究

基于2014—2019年四川气象监测的雷电大气静电场资料，研究了同期四川M_S≥5.0地震前的异常信息。结果显示，50%的M_S≥5.0地震前，大气静电场日均值有异常变化，主要表现为低值突跳，异常形态呈多样性，较突出的有不规则“W”“V”“U”型等。日均值低值异常出现后114天r=e^M空间范围内发生M_S≥5.0地震的可能性较大，其中，第10—19天，发震概率为33%；第2—9天，发震概率为17%。基于气象雷电监测的大气静电场观测资料，在排除雷电等干扰的情况下，可用于地震监测预报。

Study on seismic information of atmospheric electrostatic field in Sichuan

Based on the data of lightning atmospheric electrostatic field monitored by Sichuan meteorological from 2014 to 2019, the anomaly information before M_S ≥ 5.0 earthquakes in Sichuan Province in the same period is studied. The results show that before half of the M_S ≥ 5.0 earthquakes, the daily mean value of the atmospheric electrostatic field shows abnormal changes, mainly appearing as low-value sudden jumps with diverse anomaly forms. Typical anomaly forms include irregular "U", "V" and "W" shapes. After the occurrence of a low-value anomaly of daily mean value, there is a high possibility of M_S ≥ 5.0 earthquake within the distance of R=e^M in 114 days, of which the probability of earthquake occurrence is 33% from day 10 to day 19 and 17% from day 2 to day 9. The observation data of atmospheric electrostatic field monitored by meteorological lightning observation can be used for earthquake monitoring and prediction after removing interference such as lightning.