【摘要】 地震前ULF(Ultra Low Frequency:超低频信号,频段为0.005～10Hz,国内俗称电磁波)电磁异常信号是近年国际研究的热点。本文阐述了国际上典型震例前观测到的ULF异常信号的表现形式、目前采用的一些数据处理方法以及震前ULF信号可能的产生机制,以供相关学者参考。更多还原

【Abstract】 ULF (ultra-low-frequency) geomagnetic anomaly preceding large earthquakes is considered as a promising candidate for short-term predictor of earthquakes. In this paper the current state in the study of ULF geomagnetic variations is summarized,including the characteristics of anomaly,data analysis methods and the generation mechanism.更多还原