摘要
利用2005-01~2009-12 DEMETER电磁卫星详查模式下磁场与电场的极低频(ELF)三分量波形数据,选取东北亚地区(38°~58°N,105°~145°E)6个M_(s)≥6地震,对震前30 d震中上空±10°的6000余条1130和1135轨道数据进行波矢分析和坡印廷矢量分析。结果发现,2005-08-16日本本洲东岸近海M_(s)7.2地震和2009-06-05日本北海道地区M_(s)6.6地震震前在质子回旋频率以下记录到来源于地球的异常电磁波扰动;2005-11-10俄罗斯西伯利亚东南部M_(s)6.4地震和2007-08-02俄罗斯萨哈林岛(库页岛)M_(s)6.8地震震前在质子回旋频率以下没有记录到异常电磁波扰动;2007-02-17日本北海道地区M_(s)6.2地震和2008-06-13日本本州东岸近海M_(s)7.3地震震前在质子回旋频率以下记录到异常电磁波扰动,但并非来源于地球。
To carry out wave vector and Poynting vector analyses, we utilize ELF three-component waveform data of magnetic field and electric field in burst mode of over 6 000 number 1130 and 1135 orbital data recorded by the microsatellite DEMETER. These dataoccurred within 30 days before the earthquakes, ±10° above the epicenter for six earthquakes with M_(s)≥6 from January 2005 to December 2009 in northeast Asia(105°-145°E;38°-58°N).The study shows that the satellite recorded the arrival of the abnormal electromagnetic wave below the proton Lamor frequency originating before the M_(s)7.2 earthquake that occurred on August 16, 2005 near east coast of Honshu and the June 5, 2009 M_(s)6.6 earthquake that occurred in Hokkaido. The satellite did not record the arrival of the abnormal electromagnetic wave below the proton Lamor frequency originating from the earth before the November 10, 2005 M_(s)6.4 earthquake that occurred in eastern Russia and the August 2, 2007 M_(s)6.8 earthquake in Sakhalin.Though the satellite recorded the arrival of the abnormal electromagnetic wave below the proton Lamor frequency, the waves before the February 17, 2007 M_(s)6.2 earthquake in Hokkaido and the June 13, 2008 M_(s)7.3 earthquake near the east coast of Honshu, Japan were not from the earth.
作者
杨牧萍
钱庚
张学民
申旭辉
张萌
金艳铭
YANG Muping;QIAN Geng;ZHANG Xuemin;SHEN Xuhui;ZHANG Meng;JIN Yanming(Liaoning Earthquake Agency,44 North-Huanghe Street,Shenyang 110034,China;Institute of Seismology,CEA,40 Hongshance Road,Wuhan 430071,China;Institute of Earthquake Forecasting,CEA,63 Fuxing Road,Beijing 100036,China;National Institute of Natural Hazards,MEM,1 Anningzhuang Road,Beijing 100085,China)
出处
《大地测量与地球动力学》
CSCD
北大核心
2022年第7期669-674,共6页
Journal of Geodesy and Geodynamics
基金
辽宁省地震局青年科研基金(LZ202002)。
关键词
DEMETER电磁卫星
东北亚
波矢分析
坡印廷
异常电磁波
microsatellite DEMETER
northeast Asia region
wave vector analysis
Poynting
abnormal electromagnetic wave
