银川窗与鄂尔多斯块体西北缘中强地震的关系  

The Relationship between the Yinchuan Seismic Window and Moderate-strong Earthquakes in the Northwestern Margin of the Ordos Block

作　　者：杨红樱[1] 罗恒之 张帆[1] 郭雷 张剑影 YANG Hongying;LUO Hengzhi;ZHANG Fan;GUO Lei;ZHANG Jianying(Earthquake Agency of Inner Mongolia Autonomous Region,Hohhot,010010;Earthquake Agency of Ningxia Autonomous Region,Yinchuan,095175)

机构地区：[1]内蒙古自治区地震局,呼和浩特010010 [2]宁夏回族自治区地震局,银川095175

出　　处：《华北地震科学》2023年第3期97-100,112,共5页North China Earthquake Sciences

基　　金：内蒙古自治区地震局局长基金课题(2022YB19);中国地震局地震科技星火计划(XH20014)。

摘　　要：为了提取鄂尔多斯块体西北缘中强地震的有效预测指标,通过识别银川地区不同震级、不同范围的小震活动窗口,开展R值和molchan方法评估,选取出有预测意义的地震窗。结果显示:M_(L)4银川窗地震活动对鄂尔多斯块体西北缘6级左右地震有较好的指示意义;M_(L)3银川窗小震滑动年频次大于2时,对鄂尔多斯块体西北缘未来1年发生5级以上地震有较好的指示意义。In order to extract the effective prediction index for moderate-strong earthquakes in the northwestern margin of Ordos block,small earthquake activity windows of different magnitudes and ranges are analyzed in Yinchuan area,a seismic window with predictive significance is selected by calculating the R value and molchan test.The results show that the seismic activity of M_(L)4 Yinchuan window has a good indication for earthquakes with magnitude~6 in the northwestern margin of the Ordos block.When the annual frequency of M_(L)3 seismic activity of the Yinchuan seismic window is greater than 2,it has a good indication for the occurrence of earthquakes with magnitude greater than or equal to 5 in the northwestern margin of the Ordos block in the next year.

关 键 词：银川窗 鄂尔多斯块体 预测指标 预测效能 

分 类 号：P315.7[天文地球—地震学]