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地震

地震 ›› 2009, Vol. 29 ›› Issue (1): 121-131.

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汶川8.0级地震氡观测值震后效应特征初步分析

刘耀炜1,2, 任宏微1,2   

  1. 1.中国地震局地壳应力研究所, 北京 100085;
    2.中国地震局地下流体动力学实验室, 北京 100085
  • 收稿日期:2008-11-06 修回日期:2008-11-26 出版日期:2009-01-31 发布日期:2021-10-15
  • 作者简介:刘耀炜(1957-), 男, 河南洛阳人, 研究员, 主要从事地下流体动力学及地震预测等研究。

Preliminary Analysis of the Characteristics of Post-seismic Effect of Radon after the Wenchuan 8.0 Earthquake

LIU Yao-wei1,2, REN Hong-wei1,2   

  1. 1. Institute of Crustal Dynamics, China Earthquake Administration, Beijing 10085, China;
    2. Laboratory of Ground Fluid Dynamics, China Earthquake Administration, Beijing 10085, China
  • Received:2008-11-06 Revised:2008-11-26 Online:2009-01-31 Published:2021-10-15

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摘要： 文中收集了2008年5月12日的四川汶川8.0级地震放射性同位素氡的观测资料, 初步分析了汶川地震氡观测值震后效应的特征。 结果表明, 氡震后效应的观测点大多沿着地震破裂带分布即在震源北侧的北东向与南侧的南北向, 变化以阶变上升型为主, 而且部分观测点发生了可能与氡射气浓度相关的水位或流量同步变化。 截止到2008年10月, 大部分产生震后效应的观测点已经恢复到原来测值状态, 但仍有少部分测点保持震后变化的的高值或低值, 甚至有的测点继续上升。 对氡震后效应的初步统计分析结果, 肯定了氡射气具有对地震波响应的特点, 也提出了研究地球化学组分变化与含水层动力过程的关系等问题, 这有利于氡的地震前兆机理的研究。

关键词: 汶川地震, 氡, 震后效应, 机理解释

Abstract: Based on observed data of radioactive isotope radon, this paper analyzes the characteristics of post-seismic effect of gas radon and water radon from the 12 May, 2008.Wenchuan 8.0 earthquake. The results show that the observation points which exhibit post-seismic effect of radon are mainly distributed in the north-east and south of epicenter along the earthquake rupture zone, and the variation style is mainly step-wise rising. Some observation points exhibit changes of water levels and flow possibly associated with radon changes. Up to October 2008, most observation points which showed post-seismic effect of radon have restored to the original values, however, there have still been a small number of points maintaining high or low value, and some points even continue to rise or fall. The statistical results confirms radon changes in response to seismic waves. We also put forward some scientific issues, such as the study of dynamic relationship between the chemical composition of groundwater and aquifer, which may useful to the study of the mechanism of earthquake precursors of radon.

Key words: Wenchuan earthquake, Radon, Post-seismic effect, Mechanism interpretation

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