四川地区大气静电场的地震信息研究  

Study on seismic information of atmospheric electrostatic field in Sichuan

作　　者：邱桂兰[1] 卜俊伟[2] 靳小兵[2] QIU Guilan;BU Junwei;JIN Xiaobing(Sichuan Earthquake Agency,Chengdu 610041,China;Sichuan Meteorological Bureau,Chengdu 610071,China)

机构地区：[1]四川省地震局,成都610041 [2]四川省气象局,成都610071

出　　处：《地震地磁观测与研究》2021年第5期110-117,共8页Seismological and Geomagnetic Observation and Research

基　　金：四川省科技厅面上项目(项目编号:2018JY0428、2018JY0259)。

摘　　要：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。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.

关 键 词：雷电监测 大气静电场 地震信息 

分 类 号：P315.7[天文地球—地震学] P427.3[天文地球—固体地球物理学]