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地震

地震 ›› 1998, Vol. 18 ›› Issue (4): 358-366.

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张北-尚义地震前地下流体异常特征分析①

黄辅琼1), 王吉易2), 杨文政1)   

  1. 1)中国北京 100036 中国地震局分析预报中心;
    2)中国石家庄 050021 河北省地震局
  • 收稿日期:1998-06-03 修回日期:1998-06-17 发布日期:2022-09-23
  • 作者简介:黄辅琼,女,1967年1月出生,助理研究员,1993年获理学硕士学位,主要从事地下流体地震前兆分析与地震预报等研究工作。

THE CHARACTERISTICS OF SUBSURFACE FLUID ANOMALIES BEFORE ZHANGBEI-SHANGYI EARTHQUAKE

Huang Fuqiong1), Wang Jiyi2), Yang Wenzheng3)   

  1. 1)Center for Analysis and Prediction, CSB,Beijing 100036,China;
    2)Seismological Bureau of Hebei Province, Shijiazhuang 050021, China
  • Received:1998-06-03 Revised:1998-06-17 Published:2022-09-23

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摘要： 分析了华北北部地区（38~42°N, 110~l20°E)张北-尚义地震前出现的地下流体各测项异常。研究结果表明：异常数量多,可靠异常达36项,且流体物理异常多于化学异常;异常形态复杂,地震地下流体异常各种形态均有所表现,并以水位的趋势上升异常占优势;中长期、中期和短期异常多,临震异常不突出,震时异常显著;异常时空演化过程中,总体上呈现出异常数量由外围向震中区,由中长期向短期逐渐发展的趋势,但同时也表现出空间分布上此起彼伏,时间进程上时起时落的特征。对沿着NW向构造带出现的一批1994年同步转向上升的长趋势水位异常和水氡上升、下降长趋势异常是否完全由本次张北-尚义地震所引起,还有待进一步研究。

关键词: 异常特征, 地下流体, 张北-尚义地震

Abstract: The study on the anomalies of subsurface fluids occurred before Zhangbei-Shangyi earthquake in northern part of China (110°~120°E,38°~42°N) shows that:①There are a large number of subsurface fluid anomalies before this earthquake, and there are more physical anomalies than chemical anomalies. ②The forms of the subsurface fluid anomalies are very complicate, and all kinds of anomaly forms before this earthquake have been found. The up-rising water level anomaly is predominant. ③Anomalies appear more in the impending term than that in the long, medium- and short-term, and the co-seismic anomalies are prominent. ④In the process of anomaly development, one anomaly fell while another rose. The problem of whether the anomalies of all the long- and medium-term water level and radon are related to Zhangbei-Shangyi earthquake still needs a further research.

Key words: Anomalous character, Subsurface fluid, Zhangbei-Shangyi earthquake