安徽及邻区震源深度分布特征研究  

Distribution of Focal Depths after Relocation in Anhui and Adjacent Regions

作　　者：李军辉[1,2] 王行舟[1,2] 洪德全[1,2] 张军[1] 陶月潮[1] 何康[1,2] 王雪莹[1] 

机构地区：[1]安徽省地震局,安徽合肥230031 [2]蒙城野外地球物理观测站,安徽合肥230031

出　　处：《防灾科技学院学报》2011年第3期15-20,共6页Journal of Institute of Disaster Prevention

基　　金：中国地震局震情跟踪任务(2010020705和2010020105)联合资助

摘　　要：本文利用安徽及邻区(29°～35°N,114°～120°E)1976年1月—2009年7月重新定位后的地震目录,统计分析了不同空间范围内的震源深度分布特征,结果表明:安徽及邻区平均震源深度8 km,优势深度分布为5～15 km,其中霍山地区震源深度优势分布为3～8 km。中小地震震源深度在空间分布是不均匀的,安徽中西部地区震源深度比其他区域深,总体上西深东浅,南深北浅,造成这样分布的格局可能与安徽地区复杂的地质构造有关。总体而言,安徽及邻区地震经重新定位后震源深度多在2～15 km地壳的中上部,属浅源地震。In this article,we carried out statistical analysis on the focal depth distribution of earthquakes after relocation with different spatial scales.The result shows that the average of all earthquakes depth is 8 km.However the predominant depth of Anhui region is from 5 to15 km.The predominant depth of Huoshan region is from 3 to 8 km.The spatial distribution of the focal depth of earthquakes is inhomogeneous in Anhui and neighboring regions.From west to east,south to north,the depth of this region decreases gradually;maybe that is due to the seismic tectonics.Overall,the focal depth of earthquakes in Anhui and neighboring region is shallow,ranging from 2 to15 km in the upper crust.

关 键 词：安徽及邻区 地震 震源深度 优势分布 

分 类 号：P315.3[天文地球—地震学]