摘要
对河北易县台形变观测资料日均值和月均值在2次唐山地震前后的变化进行分析,发现该台多种观测手段在地震前记录到了显著异常,分析其共性和差异性,给出该台形变资料的异常特征和提取方法。
Anomalies in the daily and monthly mean value curve of crustal deformation anomalies before the Tangshan M4.2 and M4.8 earthquakes in 2010 and 2012 were analyzed.This study ex- amined the earthquake reflecting ability at the Yixian seismic station. Stress and strain sensitive points were identified around the focal region of the formation and evolution of the source.A rele- vant earthquake anomaly may have existed if several set of instruments or different components in the same observation all showed anomalies.The reliability of a group of anomalies was better than a single anomaly.The shape of anomalies may have differed in the same observation before differ- ent earthquakes.This difference must be detected in order to reasonably identify anomalies.Simi- larity among anomalies in the short and imminent stage dominates earthquake preparation.
出处
《地震工程学报》
CSCD
北大核心
2015年第B07期91-94,共4页
China Earthquake Engineering Journal
基金
河北省地震局监测
预测
科研三结合项目资助课题(2015-10-31-06)
关键词
易县地震台
形变观测
异常信息
映震能力
Yixian seismic station
deformation observation
anomalous information
earthquake reflecting ability
