2022年1月8日青海门源6.9级地震前电离层异常特征分析  

Characteristics of ionospheric anomalies before the Menyuan,Qinghai M_(S)6.9 earthquake on January 8,2022

作　　者：赵彬彬[1] 钱才 尼鲁帕尔·买买吐孙[1] 张小涛[2] 余怀忠[2] ZHAO Binbin;QIAN Cai;Nilupaer·Maimaitusun;ZHANG Xiaotao;YU Huaizhong(Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi 830011, Xinjiang, China;China Earthquake Networks Center, Beijing 100045, China)

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011 [2]中国地震台网中心,北京100045

出　　处：《地震工程学报》2022年第3期691-699,共9页China Earthquake Engineering Journal

基　　金：新疆地震科学基金(202205);地震预测开放基金(2021EF0F08);新疆维吾尔自治区自然科学基金(2021D01A132);新疆地震科学基金(202102)。

摘　　要：利用张衡一号电磁卫星朗缪尔探针观测的原位电子密度数据和等离子体分析仪观测的原位氧离子密度数据,针对2022年1月8日青海门源M_(S)6.9地震,分析震前电子密度和氧离子密度异常特征,并总结以往震例。结果显示,在门源M_(S)6.9地震前11天出现电子密度和氧离子密度高值异常;对电离层异常进行震例统计分析,发现大多数地震前6天以内出现电离层异常,且走滑型地震和逆冲型地震震前居多,讨论异常产生的机理可能为大气声重波机制和电场机制。Based on the electron density data observed by Langmuir probe and the Oxygen ion density data observed by plasma analyzer of Zhangheng-1 electromagnetic satellite,the characte-ristics of electron density and oxygen ion density anomalies before the Menyuan,Qinghai M_(S)6.9 earthquake on January 8,2022 were analyzed,and the anomalies before previous earthquakes were also summarized.The results show that high values of electron density and oxygen ion density appear 11 days before the Menyuan M_(S)6.9 earthquake.Through the statistical analysis of ionospheric anomalies before 16 earthquakes,it is found that anomalies are generally observed within 6 days prior to earthquakes,and most of them occur before strike-slip and thrust earthquakes.The acoustic gravity wave mechanism and electric field mechanism were considered as the possible generation mechanism of anomalies.

关 键 词：“张衡一号”电磁卫星 门源6.9级地震 电子密度 离子密度 电离层异常 

分 类 号：P319[天文地球—固体地球物理学]