摘要
分析处理了唐山、松潘、共和等７级以上大震的震例资料，研究了大震水化学参量的源兆与场兆的判别指标，并指出：水化学参量的趋势异常源兆出现得早，场兆出现得晚；源兆所占的比例高，场兆所占的比例低等。进而提出了１年尺度７级以上大震水化学参量的前兆指标。
In this paper, we analysed the data of Tangshan, Songpan and Gonghe earthquakes with M ≥7.0, studied the judging indexes between “field precursors” and “focus precursors” of hydrochemical parameters before strong earthquakes. It is pointed out that among the long term anomalies of hydrochemical parameters, the“focus precursor” emerges earlier than the “field precursor”. A large proportion of all earthquake precursors is focus precursor. The precursory indexes of hydrochemical parameters for judging strong earthquakes ( M S ≥7.0) in a year are presented.
出处
《地震》
CSCD
北大核心
1999年第2期155-160,共6页
Earthquake
基金
中国地震局"九五"科研攻关项目
关键词
大震
水化学
场兆
源兆
判别指标
地震前兆
Strong earthquake, Hydrochemistry, Field precursor, Focus precursor, Judging index
