地下流体中强震源兆、场兆和强震远兆特征及其物理成因  

The characteristics of the focal precursors, field precursors before moderately strong earthquakes and remote precursors before strong earthquakes and their physical essence

作　　者：高小其[1] 许秋龙[1] 王道[1] 李艳萍[1] 崔勇[1] 范博勤[1] 

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《地震》2002年第3期81-88,共8页Earthquake

摘　　要：初步分析了乌鲁木齐 9、1 0号泉地下流体中强震源兆、场兆及强震远兆特征。结果表明 ,中强震源兆具体表现为震前 1～ 2年观测点的绝大多数主测项出现同步性高值异常 ,临震前可能出现转折或反向 ,震后恢复正常 ;绝大多数中强震场兆则表现为观测点仅有部分测项出现短期异常变化 ;而强震场兆则表现为观测点少数映震性能较好的几个测项出现同步性较好的中期前兆异常 ;强震 (群 )远兆则主要表现为个别映震较好的测项出现前兆异常。并对震兆形成的原因进行了初步探讨。In this paper, the characteristics of focal precursors, field precursors of subsurface liquid before the moderately strong earthquakes and the remote precursors before the strong earthquakes are analyzed. The results show that the focal precursors of moderately strong events occurred 1 2 years before the moderately strong events, most of synchronous anomalies of major observational items occurred at the observational sites, the reverse or turning the anomalies might occur imminently before the moderately strong events and recovered after the events. Most of the field precursors are expressed as change of the short term anomalies at a few observational sites rather than all the sites, while the field precursors of strong earthquakes occurred at a few observational sites, where only some observational items with good earthquake reflecting capacity show synchronous medium term anomalies. The remote precursors of strong earthquakes (or earthquake swarm) are mainly expressed as the precursory anomalies of few observational items with good earthquake reflecting capacity. The cause of earthquake precursors is also preliminarily discussed.

关 键 词：地下流体 中强地震 地震前兆 新疆 映震性能 

分 类 号：P315.723[天文地球—地震学]