地球磁场对太阳风的加卸载响应与华北地震

THE LOAD-UNLOAD RESPONSE OF GEOMAGNETIC FIELD TO SOLAR WIND AND EARTHQUAKES IN NORTH CHINA

本文将磁暴过程作为地球磁场对太阳风的加卸载响应，计算分析了中国华北地区３０个地磁台站１９９５－０１—１９９６０３垂直分量Ｚ的暴时场Ｄ８ｔ（Ｚ）加卸载响应比值ｆＤ（Ｚ）的变化，发现ｆＤ（Ｚ）的高值异常与其周围１５０ｋｍ范围内发生的ＭＬ＝５．４，５．６和６．６级的３个中强地震对应较好．同时还发现冀中南及冀鲁豫交界地区ｆＤ（Ｚ）的高值异常与１９９６０８的罕见大暴雨、洪涝灾害有关，并进行了初步定性讨论．

In this paper, the geomagnetic storm process is considered as the load-unloading response of geomagnetic field to solar wind. The data of the vertical component Z of 30 magnetic stations in North China are used to anajyse the ratio fD(Z) of loadunloading response of storm time field Dst(Z). The anomalous fD(Z) are correlated with three moderate strong earthquakes of ML = 5.4, 5.6 and 6.6 which occurred sac150km away from the anomalous stations. Moreover, the zones of abnormal fD(Z)in the middle-south of Hebei, and the boundary of Hebei, Henan and Shandong are corresponded to the catastorm and flood disaster in August of 1996 in the same locations. And the result is discussed primitively.