精河MS6.6地震前地下流体异常特征分析

Analysis on Anomaly Characteristics of Underground Fluid Before the Jinghe,Xinjiang MS6.6 Earthquake in 2017

摘要:

对2017年8月9日精河M_S6.6地震周边地下流体异常进行了分析和总结。结果表明，距精河M_S6.6地震震中400km范围内存在7项异常，异常持续时间具有阶段性的特点，以1~8个月的异常为主。异常在空间上分布不均一、不连续，异常出现时间与震中距间的关系不明显。部分异常形态特征具有明显的重现性。结合前人的研究结果分析认为，区域构造应力、应变的变化是异常出现的主要原因。

Abstract:

We summarized and analyzed the anomalies of the underground fluid associated with the Jinghe M_S6.6 earthquake on August 9,2017. The results showed that there are 7 anomalies in the area of 400km around the epicenter,and the abnormal duration is periodical,mainly from 1 to 8 months. The anomalies are inhomogeneous and discontinuous in space,and the relationship between occurrence time of anomalies and epicenter distance is not obvious. Parts of anomalies have obvious reproducibility. Based on previous achievements,it is considered that the change of the regional tectonic stress and strain is the main reason of abnormal occurrence.