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Title:: Study on Characteristics of Medium-term and Medium-Short-term Precursor Anomalies of Water Level and Hydroradon in North China Region

作者:: 范雪芳¹; 2; 刘耀炜³; 吴桂娥¹; 陆明勇⁴; 李斌¹; 2; (1.山西省地震局,太原 030021; 2.太原大陆裂谷动力学国家野外科学观测研究站,太原 030025; 3.中国地震局地壳应力研究所,北京 100085; 4.中国地震应急搜救中心,北京 100049)

Author(s):: FAN Xue-fang¹; 2; LIU Yao-wei³; WU Gui-e¹; LU Ming-yong⁴; Li Bin¹; 2; (1.Earthquake Administration of Shanxi Province,Taiyuan 030021,Shanxi,China)(2.National Continental rift Valley Dynamics Observatory of Taiyuan,Taiyuan 030025,Shanxi,China)(3.The Institute of Crustal Dynamics,Beijing 100085,China)(4.National Earthquake Response Support Service,Beijing 100049,China)

Keywords:: ground fluid; identification; quantitative determination; precursor anomaly; North China

摘要:: 收集华北地区地下流体观测资料并进行系统分析,采用定量方法判定异常,对该区强震前的前兆异常特征进行了研究。提出地下流体存在着趋势上升型的中期异常和转折型的中短期异常,且不同地震的前兆异常图像具有相似性; 依据大量异常资料,给出了华北地区中长期和中短期前兆异常的统计特征,以期能为华北地区年度会商的地震预测提供较为确切的依据。

Abstract:: Precursor anomaly characteristics before strong earthquakes in North China region are studied by the method of quantitatively determining anomalies based on systematic collection and analysis of observation data of underground fluid in this region.The results indicate that medium-term precursor anomalies with uptrend and medium-short-term with transition of underground fluid appeared before earthquakes,and precursor anomaly graphs were comparable before different earthquakes.Statistic characteristics of medium-long-term and medium-short-term precursor anomalies are presented based on a larger amount of anomaly data.These results can provide accurate evidence for annual earthquake prediction of this region.