摘要
基于精河M_S6.6地震震中附近地球物理定点观测资料,分析精河地震前9项中、短期异常变化特点,讨论震中附近区域异常时空演化特征。结果表明:精河地震前地球物理定点观测中、短期异常在时间上具有阶段性特征,震前6~12个月和震前1个月异常数量较多,异常主要在地震发生前、后1个月恢复;异常形态以年变畸变和速率快速变化为主;在空间上异常分布相对集中,异常表现为由南向北、由西向东迁移,且逐渐远离震中的特征。
Based on the fixed-point geophysical observation data near the epicenter of Jinhe earthquake with M_S6.6,the characteristics of the nine short-term and medium-term anomalies before the earthquake are analyzed,and the temporal and spatial evolution characteristics of regional anomalies near the epicenter are discussed.The results show that the medium-term and short-term anomalies in the fixed-point geophysical observation before the earthquake have the characteristics of stages in time.There are many anomalies in 6~12 months before the earthquake and 1 month before the earthquake,and the anomalies mainly recover within 1 month before and after the earthquake.The anomalies are mainly annual variation distortion and rapid rate change.The spatial distribution of the anomalies is relatively concentrated,and the anomalies move from south to north,from west to East,and gradually away from the epicenter.
作者
韩桂红
HAN Gui-hong(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)
出处
《内陆地震》
2019年第4期306-313,共8页
Inland Earthquake
基金
国家自然科学基金(41672208)
中国地震局地震预测研究所新疆精河6.6级地震深入科学研究项目(1747074512)联合资助.
关键词
精河
地球物理
定点形变
中短期异常
演化特征
Jinhe
Geophysical field
Fixed point deformation
Medium-short term anomalies
Evolutional characteristics
作者简介
韩桂红(1983~),女,工程师,博士,2013年毕业于新疆大学自然地理学专业,主要从事地震前兆分析预报工作.E-mail:hanguihong618@163.com
