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地震 ›› 1999, Vol. 19 ›› Issue (1): 71-80.

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华北强震水化学参量变化的模糊识别及方法评价

李君英, 唐仲兴   

  1. 中国天津 300201 天津市地震局
  • 收稿日期:1998-06-17 修回日期:1998-07-17 出版日期:1999-01-31 发布日期:2022-09-19
  • 作者简介:李君英,女,1952年12月出生,工程师,主要从事地下流体分析预报和研究工作。
  • 基金资助:
    中国地震局“九五”科研攻关项目(950401 01 07)

FUZZY RECOGNITION OF THE HYDROCHEMICAL COMPONENT VARIATIONS BEFORE STRONG EARTHQUAKES IN NORTH CHINA AND THE CALCULATION METHOD EVALUATION

Li Junying, Tang Zhongxing   

  1. Seismological Bureau of Tianjin Municipality, Tianjin 300201, China
  • Received:1998-06-17 Revised:1998-07-17 Online:1999-01-31 Published:2022-09-19

摘要: 利用模糊识别方法对1969~1998年发生在华北地区的渤海、海城、唐山3次强震及其强余震以及大同、包头西、张北3次中强震之前,该地区〔38 ~ 42N、108 ~124E)50多口观测井的水氨和部分井孔的He、H2、co2、Hg等水化学组分8万多个观测数据进行了全面处理,取得了华北地区强震前水氨、气体和水质组分前兆变化的时空分布特征,并提出了该地区强震和中强 地震水化学参量中期和短期的异常指标,最后对模糊识别方法的地震预报效能提出评价。

关键词: 水化学, 模糊识别, 预报效能, 华北

Abstract: This paper, by using the method of fuzzy recognition of earthquake precursors, the eighty thousands' sets of hydrochemical data, such as Rn, He, H2, C02, Hg, etc. of 50 wells before three strong earthquakes (Bohai, Haicheng and Tangshan earthquakes) and its strong aftershocks as well as three moderately strong earthquakes (Datong, western Baotou and Zhangbei earthquake) in North China during the period 1969~1998 have been analysed. The temporal and spatial distribution characteristics of precursory variations of Radon content, ionic and gaseous components in groundwater before strong earthquakes have been studied. The medium- and short term anomaly indexes of hydrochemical compo­nents before strong and moderately strong earthquakes in this region are suggested. Final­ly, the capability to predict earthquake for the fuzzy recognition method is also discussed.

Key words: Hydrochemistry, Fuzzy recognition, Prediction capability, North China