【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。更多还原

【Abstract】 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.更多还原