银川地堑地震背景与近期地震活动趋势初步分析  

PRELIMINARY ANALYSIS ON SEISMOLOGICAL BACKGROUND AND RECENT SEISMICITY TREND OF YINCHUAN GRABEN

作　　者：雷芳[1] 陈玉华[2] 董治平[1] 王珍 赵仪全[1] 

机构地区：[1]国家地震局兰州地震研究所,兰州730000 [2]青海省地震局,西宁810001

出　　处：《高原地震》1997年第4期58-64,共7页Plateau Earthquake Research

摘　　要：地震地质及历史地震资料分析表明，银川地堑存在强震孕育和发生的地质构造背景。现代地震活动、地震能量积累和线性预测研究结果表明，银川地堑尚不存在发生大震的动态背景，5级左右的中强地震仍有可能在吴忠-灵武-带发生。The analysis of data of historical earthquakes and seismogeology are indicated that thereis a geological tectonics background of occurring and developing of strong earthquakes inYinchuan Graben. The current seismicityaccumulation of seismic energy and linear extrapolation of earthquakes in investigation area are studied. The results show that there is not adynamic background of occurring large earthquakes in Yinchuan Craben,and in which'moderately strong earthquakes with about magnitudes 5 would occur in Wuzhong- Lingwu area.

关 键 词：地震背景 地震活动趋势 线性预测 银川地堑 

分 类 号：P315.5[天文地球—地震学]