摘要
依据中国震例（1966~2006年）收录的116个水氡前兆震例,统计分析了水氡前兆异常形态、异常时空分布等特征。结果表明,水氡异常出现的时间范围较广,在震前十几分钟至几年内均有出现,异常开始距发震时间、异常持续时间主要和震级大小、发震机制、异常变化类型等有关,异常台站震中距范围从0~500多千米,异常形态主要有上升、下降、突跳、破年变和其他异常形态等4类,上升、下降、破年变异常动态主要表现为中期异常,突跳型异常动态主要表现为短临异常。最后提取了12个7级震例、31个6级震例前水氡前兆异常特征,归纳强震判定指标。
Based on 116 Water Radon earthquake precursory cases collected in Earthquake Cases in China from 1966 to 2006,this paper analyzed the water radon precursory anomalies,abnormal morphological characteristics of temporal and spatial distribution characteristics.The result shows that the time of water radon anomalies appeared range is wide,before earthquakes have ten minutes to several years.The abnormal appearance relevant to the time of the earthquake and the anomaly duration were mainly concerned with the magnitude and mechanism of earthquake as well as the type of abnormal changes.The anomalous station epicentral distance ranged from 0 to 500 km,which abnormal form had mainly four classes,such as the rise,fall,jump,breaking the annual variation and other abnormal morphology.The form of rise,fall and break the abnormal change of dynamic mainly manifested as medium term anomaly,while jump type dynamic abnormal mainly for short impending anomaly.Finally,this study summed up the index to judge the strong earthquake through the extraction of 12 MS7 earthquake cases and 31 MS6 earthquake cases before the earthquakes precursory anomaly characteristics of Water radon.
出处
《内陆地震》
2016年第2期168-176,共9页
Inland Earthquake
基金
财政部行业专项(201408008)
中央级公益性科研院所基本科研业务专项(IGCEA-12-21)联合资助
关键词
中国震例
水氡
前兆异常
判定指标
Earthquake cases in China
Water radon
Precursory anomaly
Identification index
