摘要
本文根据断裂力学与感应磁效应原理，分析研究了云南地磁台网近２０年的实际观测结果，发现一旦有台站出现地磁垂直分量日变幅差异步变化，其后一个多月内，在其周围将有７０％以上可能发生地震（２００公里内Ｍ≥６地震，７０─８０公里内Ｍ≥５地震；４０─５０公里内４级左右地震；２０─３０公里内本地小震）。从而提出利用地磁日变幅差的异步变化现象预报地震的可能性。
Based on the principle of fracture mechanics and seismomagnetic induction effect, the observation data from the geomagnetic network of Yunnan since recent twenty years are analysed. It is found that once asynchronous variation of amplitude difference of daily change on vertical component of geomagnetic field occurs at some station, there is possibility of earthquake occurrence with more than 70% around the station and within one month and more following the variation(M≥6 within 200 Km,M≥5 within 70─80 Km, M=4 within 40─50 Km and small local earthquake within 20─30Km). Therefore, it is possible to predict earthquake using asynchronous variation of amplitude difference of daily change.
出处
《地震研究》
CSCD
北大核心
1995年第3期264-271,共8页
Journal of Seismological Research
关键词
地磁
地比求异法
地震预报
云南
Geomagnetic vertical component, Geomagnetic daily variation, Geomagnetic anomaly, Earthquake prediction, Yunnan.
