张北-尚义地震现场CO_2测量与震后趋势判断
|
摘要
利用ＣＯ２快速测定法监测了张北－尚义地震现场４个观测点的ＣＯ２动态特征，并初步讨论了ＣＯ２的来源。结果表明ＣＯ２没有明显的异常，故认为６．２级地震之后，震区构造应力没有进一步增强的迹象。因此于１９９８年１月２０日和２月３日两次提出１５ｄ内震区发生ＭＳ≥５．０强余震的可能性不大的震后趋势预测意见。事实证明这个判断是正确的。
ynamic characteristics of CO2 at 4 observation sites in the field of ZhangbeiShangyi M6.2 earthquake are studied by using fast measurement method for CO2. The source of CO2 is discussed preliminarily. The results indicate that no anomaly in CO2 is observed. It is suggested that there is no signal of increase in tectonic stress after ZhangbeiShangyi earthquake. According to the regulation of change in CO2, on Jun.10 and Feb.3, 1998 , respectively, we predicted that there will be little possibility to occur strong aftershocks of MS≥5.0 in 15 days. The fact indicates that the prediction is correct. It is suggested that the fast measurement method for CO2 will pay an important role in prediction of seismic trend after main shock.
ynamic characteristics of CO2 at 4 observation sites in the field of ZhangbeiShangyi M6.2 earthquake are studied by using fast measurement method for CO2. The source of CO2 is discussed preliminarily. The results indicate that no anomaly in CO2 is observed. It is suggested that there is no signal of increase in tectonic stress after ZhangbeiShangyi earthquake. According to the regulation of change in CO2, on Jun.10 and Feb.3, 1998 , respectively, we predicted that there will be little possibility to occur strong aftershocks of MS≥5.0 in 15 days. The fact indicates that the prediction is correct. It is suggested that the fast measurement method for CO2 will pay an important role in prediction of seismic trend after main shock.
引文
林元武，翟盛华．1994．怀来后郝窑断层气CO2释放与地震关系研究．见：国家地震局科技监测司编．首都圈地震短临预报新方法观测与研究．北京：地震出版社．127～130．林元武，王基华，高松升．1997．断层气CO2快速测定法及其在地震短临预报中的应用．见：国家地震局地质研究所编．地震监测预报的新思路与新方法．北京：地震出版社．67～74．张炜，王吉易，鄂秀满，等．1988．水文地球化学预报地震的原理与方法．北京：教育科学出版社．252～272．MyachkinVI，BraceWF，SobolevGA，etal．1975．Twomodelsforearthquakeforerunners．PureandAppliedGeophysics，113：1～12．
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心