新疆43号泉的降水影响及震例分析
|
摘要
分析了新疆４３号泉水流量的地震前兆特征及大气降水影响。结果表明，一次大气降水过程对流量的影响甚微，影响幅度一般小于１％，但年降水量对流量的趋势变化影响较大，这可能与降水补给经历较长的地下径流有关。对于１５０ｋｍ范围内的中强震，４３号泉可观测到明显的中短期异常，异常一般在震前５个月左右出现；短临异常也较显著。对一些ＭＬ３～４级的地方震，往往仅有短临异常显示。从异常开始至发震一般１０～２０天，据此可与中强震异常相区分。
Seismic precursor characteristics of the spring no. 43 in Xinjiang and the rainfall influence on it are analysed in the paper. The result shows that the influence caused by one time rainfall process is much less, The influence range is usually less than 1%, but the annual rainfall bas great influence on the spring flow. Maybe this has something to do with the long distance of ground flow of the rainfall, The medium and short term earthquake precursor anomaly caused by mid and strong earthquakes within 150 km range can be observed obviously with the spring no. 43. Anomaly usually appears 5 monthes before earthquake and sometimes, short term and impending anomolies are also very obvious. Be-fore some local earthquakes with Ms3～4, usually only some short term and impending anomaly can be observed. The period from the amomaly appearance to earthquake occurrence generally is 1020 days. So, the anomaly of local earthquake with Ms 3～4 can be distingquashed from the one of mid and strong earthquakes.
Seismic precursor characteristics of the spring no. 43 in Xinjiang and the rainfall influence on it are analysed in the paper. The result shows that the influence caused by one time rainfall process is much less, The influence range is usually less than 1%, but the annual rainfall bas great influence on the spring flow. Maybe this has something to do with the long distance of ground flow of the rainfall, The medium and short term earthquake precursor anomaly caused by mid and strong earthquakes within 150 km range can be observed obviously with the spring no. 43. Anomaly usually appears 5 monthes before earthquake and sometimes, short term and impending anomolies are also very obvious. Be-fore some local earthquakes with Ms3～4, usually only some short term and impending anomaly can be observed. The period from the amomaly appearance to earthquake occurrence generally is 1020 days. So, the anomaly of local earthquake with Ms 3～4 can be distingquashed from the one of mid and strong earthquakes.
引文
1王道．新疆天山地区地下流体地震前兆研究的现状与发展前景．内陆地震，1995，9（2）．2李茂玮．库尔勒5．2级地震活动特征及前兆异常．内陆地震，1989，3（2）．3高国英．阿拉沟5．2级地震前某些前兆手段的异常变化及其短临预报．内陆地震．1991．5（3）．4高旭，马宗晋．地震大形势研究．地震科学研究，1983，（1）．
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