1976年内蒙古巴音木仁6.2级地震前地震危险度D值异常动态演变特征  

Dynamic Evolution Characteristics of D Value Anomaly of Seismic Risk Degree Before Bayinmuren M6.2 Earthquake in Inner Mongolia in 1976

作　　者：许晓庆[1] 白晓川[1] 师海阔[1] XU Xiao-qing;BAI Xiao-chuan;SHI Hai-kuo(Earthquake Administration of Ningxia Hui Autonomous Region,Ningxia Yinchuan 750001,China)

机构地区：[1]宁夏回族自治区地震局,宁夏银川750001

出　　处：《防灾减灾学报》2023年第1期69-74,共6页Journal of Disaster Prevention And Reduction

基　　金：宁夏回族自治区科技厅自然科学基金项目(2020AAC03440/2020AAC03441/2022AAC03693)联合资助。

摘　　要：对1976年9月23日内蒙古巴音木仁6.2级地震进行地震危险度D值的回溯性检验,发现震前2年震例震中区确实出现D值异常,随着主震时刻的不断临近,D值异常呈现减弱—消失—出现—消失至主震发生的现象。分析认为利用该参数进行时、空扫描计算,确实能反应主震前小地震活动的时空特点,该方法是一种值的深入探索的地震预测手段。A retrospective test of the seismic risk D value of the Bayinmuren M6.2 earthquake on September 23,1976 in Inner Mongolia was carried out.It is found that the D value anomaly does appear in the epicen⁃tral region 2 years before the earthquake.With the approaching of the main shock time,the D value anoma⁃ly shows the phenomenon of weakening-disappearing-appearing-disappearing to the main shock.It is con⁃cluded that the time-space scanning calculation with this parameter can really reflect the space-time charac⁃teristics of small earthquake activity before the main shock.

关 键 词：地震危险度D值 时空特点 震中区 

分 类 号：P315.7[天文地球—地震学]