新疆地震前兆异常特征研究  

The research on precursor anomaly earthquake in Xinjiang

作　　者：杨又陵[1] 高国英[1] 温和平[1] 蒋靖祥[1] 

机构地区：[1]新疆维吾尔自治区地震局,乌鲁木齐830011

出　　处：《地震》2005年第1期89-96,共8页Earthquake

基　　金："十五"中国地震局科研攻关项目(2001BA601B01-03-03)

摘　　要：利用几种综合分析方法研究了前兆群体异常与新疆区域地震活动的关系;在单项观测手段研究的基础上,归纳了新疆中短期前兆异常、尤其是短期异常的特征及阶段性演化标志;剖析了2个典型震例。研究认为,新疆中强以上地震的前兆异常存在明显的阶段性,综合分析方法可为中短期预测的提供依据;多测项前兆异常的准同步转折是阶段性发展的主要指标;短期内多种异常的集中出现可能是进入短期阶段的标志;在无明显趋势性的背景异常时,大范围、多测项的前兆突变可能是强远震的异常特征;形变异常强度AF值可为判定地点提供依据。By using several techniques of synthetic analysis, we studied the relation between the precursory anomaly and regional level of seismic activity in Xinjiang region. Based on the research of single item measurement, we concluded the characteristics of the middle-short-term precursory anomaly, especially the short-term and the sign of phase e-volution, and then we analyzed 2 typical earthquake examples. So we consider that the short-term precursory anomaly of moderately strong earthquakes in Xinjiang region has a clear sign of phase, the techniques of synthetic analysis can offer the evidence for mid-long-term forecast, and the quasi-synchronous turning of many items is the main index of it. The concentrative appearance of many anomalies may be the phase sign of short-term a-nomaly, moreover, a widely sudden appearance of anomaly that has not background perhaps indicates the sign of the strong teleseism, and the anomaly intensity of deformation (AF value) can offer the information that where the earthquake will occur.

关 键 词：地震前兆异常 特征研究 短期异常 区域地震 群体异常 形变异常 远震 基础 强度 判定 

分 类 号：P315[天文地球—地震学]