中国大陆强震前兆时空分布的大尺度特征初探

依据对中国大陆一些强震(M_s≥7.0)震例前兆异常的分析,初步阐述了中国大陆强震前兆时空分布的大尺度特征:①强震的前兆场及震后的影响场是广阔的;②有些前兆异常的时间较长,可能与几个强震有关,持续十几年。

PRELIMINARY APPROACH TO LARGE-SCALE CHARACTERISTICS OF TIME-SPACE DISTRIBUTION OF STRONG EARTHQUAKE PRECURSORS IN CHINA MAINLAND

Based on the analysis of precursory anomalies of some strong earthquake (Ms>>>>>>7.0) cases in China Mainland, this paper illustrated the large-scale characteristics of the time-space distribution of strong earthquake precursors in China Mainland: (1) the precursory field of strong earthquakes and the affected field after earthquakes are vast, which might extend all over China Mainland; (2) the abnomal time of some precursors is longer, which may be related with several strong earthquakes, even some leap over the 4th seismic high-tide period (1966-1976) in China Mainland since this century. In addition, before strong earthquakes, the precursory anomalies occurred throughout China Mainland are relatively concentrated at the shortimpen-ding stage, formed an anomalous peak value, and some precursory anomalies are of obvious coseismic effect features. The region where the coseismic effect anomalies occur will probably be the causative area of future earthquakes. According to this, we proposed the "China-Mainland comprehensive precursory method", for earthquake prediction.