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地震 ›› 1999, Vol. 19 ›› Issue (2): 155-160.

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大震水化学参量“场兆”与“源兆”判别指标的研究

张慧, 王长岭   

  1. 中国兰州 730000 中国地震局兰州地震研究所
  • 收稿日期:1998-03-25 修回日期:1998-06-03 出版日期:1999-04-30 发布日期:2022-09-19
  • 作者简介:张慧,女, 1966年 3月出生,副研究员,主要从事地下流体应用基础理论研究及地震预报工作。
  • 基金资助:
    中国地震局“九五”科研攻关项目(96-04-01-01-07)

STUDY OF JUDGING INDEXES BETWEEN “ FIELD PRECURSOR” AND“ FOCUS PRECURSOR ” OF HYDROCHEMICAL PARAMETERS BEFORE STRONG EARTHQUAKES

Zhang Hui, Wang Changling   

  1. Lanzhou Institute of Seismology, CSB, Lanzhou 73000, China
  • Received:1998-03-25 Revised:1998-06-03 Online:1999-04-30 Published:2022-09-19

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。

关键词: 大震, 水化学, 场兆, 源兆, 判别指标

Abstract: In this paper, weanalysed the data of Tangshan, Songpan and Gong he earthquakes with M ≥ 7. 0, studied the judging indexes between“ field precursors” and “ focus precur-sors” of hydrochemical parameters before strong earthquakes. It is pointed out that among the long-term anomalies of hydrochemical parameters, the“ focus precursor” emerges earli-er than the“ field precursor”. A large proportion of all earthquake precursors is focus pre-cursor. The precursory index es of hydrochemical parameters for judging strong earth-quakes ( MS ≥ 7. 0) in a year are presented.

Key words: Strong earthquake, Hydrochemistry, Field precursor, Focus precursor, Judging index