摘要
本文从监测泉点的水文地质概况入手 ,结合近 1 9年来的资料分析了 1 0号泉水中氦含量变化的映震特征 :氦含量变化的地震前兆异常基本上都是正异常 ,且具有较好的重复性 ,泉点即流量测值遵循 :背景值—趋势性上升 (或突升 )—最高值—趋势性下降 (或突降 )—恢复至背景值的变化过程。而地震常常发生在氦含量由高变低的过程中。
The hydrogeology conditions around Urumqi 10th well and the helium content observation data for 19 years are introduced The response characteristics of the helium content change in spring-water show that the helium content will increases if there is to be an earthquake After an earthquake, the helium content decreases to its normal level This response characteristic keeps well in our researching period The flow rate of spring-well changes as following procedure: background level - trending-increase (or suddenly jump up) - peak level - trending-decrease (suddenly jump down) - background level When the helium content in spring-water changes from peak to low, often an earthquake occurs At last, we think that both hydrogeology conditions and circulation environment of spring-water flowing are key factors to explained above response characteristics for an earthquake
出处
《四川地震》
2002年第3期27-31,共5页
Earthquake Research in Sichuan
