中国大陆西部7级以上地震前地震空区演化过程分析  

Analyze on Evolution Process of Seismic Gap before M≥7. 0 Earthquakes in the Western Part of China Mainland

作　　者：陈玉华[1] 姚家骏[1] 

机构地区：[1]青海省地震局,青海西宁810001

出　　处：《地震研究》2013年第4期418-426,553,共9页Journal of Seismological Research

基　　金：中国地震局监测预报司2012年度震情跟踪项目"西北地区强震地震活动图像异常总结"青海省地震科学基金项目(2012A05);2013年震情跟踪青年课题(2013020105)联合资助

摘　　要：通过对1970 ～2010年中国大陆西部M≥7地震前地震空区演化的研究,认为M≥7大震前中等以上地震空间展布呈现有规律演化过程,M≥6、M≥5、ML≥4地震在同一构造区域逐渐出现大面积平静,形成不同震级档配套的地震空区.这一图像演化过程对M≥7大地震的孕育区域有一定的指示意义,对M≥7地震的中期预测有积极作用.By studying the evolution process of seismic gaps before M≥7.0 earthquakes occurred in the western part of China mainland from 1970 to 2010,it was suggested that the spatial distribution evolution process of moderate and strong earthquakes showed relatively regular before M≥7.0 earthquakes,which showed that M≥6,M≥5and ML ≥4 earthquakes gradually appeared very quiet in a large area at the same tectonic region,forming seismic gaps with different magnitude intervals.The evolution process of such patterns is the guidance of the pregnancy zone of M≥7.0 earthquakes,and has an important effect on the medium-term prediction on the M≥7.0earthquakes.

关 键 词：7级以上地震 地震空区 中期预测 中国大陆西部 

分 类 号：P315.72[天文地球—地震学]