夏河5.7级地震前青海地下流体台网异常特征研究  

Anomaly Characteristics of the Qinghai Underground Fluid Network before the Xiahe M5.7 Earthquake

作　　者：李滔[1] 马建新[1] 丁宁霞[1] 苏宁[1] LI Tao;MA Jianxin;DING Ningxia;SU ning(Qinghai Earthquake Agency, Xining 810001, Qinghai, China)

机构地区：[1]青海省地震局,青海西宁810001

出　　处：《地震工程学报》2020年第3期791-798,共8页China Earthquake Engineering Journal

基　　金：青海省地震局基金课题(2020A03)。

摘　　要：2019年10月28日夏河5.7级地震前,青海地下流体台网出现一系列的异常。本文即选取了青海地下流体台网中出现异常的门源水位水温、平安水位水温、乐都水温、佐署水温、湟源水氡、西宁水氡,对异常变化形态、时间进程和同步性、异常空间分布等进行了分析,并异常产生的原因以及与夏河地震的关系进行探讨。认为这些异常不是夏河地震震源体活动导致的,而是青藏高原东北部的构造应力场整体变化的结果,是场兆而不是源兆。A series of anomalies occurred in the Qinghai underground fluid network before the Xiahe M5.7 earthquake on October 28,2019.This paper selected the water level and temperature anomalies in the Menyuan and Pingan county,the water temperature anomalies in Zuoshu and Ledu,the water radon anomalies in Huangyuan and Xining,and the underground fluid network of Qinghai.The abnormal change pattern,time course and synchronization,and spatial distribution were analyzed,and the causes of the anomalies and relationship with the Xiahe M5.7 earthquake were discussed.It is believed that these anomalies were not caused by the activity of the Xiahe earthquake,but were the result of an overall change of the tectonic stress field in the northeastern Qinghai-Tibet Plateau.These anomalies are seismic field precursors and not source precursors.

关 键 词：夏河5.7级地震 地下流体 前兆异常 应力场变化 

分 类 号：P315[天文地球—地震学]