安徽“霍山窗”中强震分布与断裂关系研究

Relationship between moderate-strong earthquake and faults in“Huoshan seismic window”,Anhui Province

应用ArcGIS10.0软件平台,建立"霍山窗"地区主要断裂、地震资料的矢量数据和空间数据库,运用缓冲区分析、统计分析、叠加分析等空间分析功能,确定以25km为半径的缓冲区包含93.9%以上地震,并依据叠加结果,计算得出单位断裂长度的地震数量。分析数据表明,落儿岭—土地岭断裂活动性最强,青山—晓天断裂、梅山—龙河口断裂的地震活动性次之。最后,通过断裂与地震缓冲区分析结果,发现在断裂交汇处易发生强震。

Take arcgis10.0software as a platform,the main faults,seismic data of vector data and spatial database in ＂Huoshan seismic window＂area are established.It shows there more than 93.9% of the earthquake in 25 km radius buffer by using buffer analysis,statistical analysis,overlay analysis and spatial analysis function.The number of earthquakes per unit fracture length are calculated according to the superposition of the results.Analysis of the data shows that Luoerling—Tudiling fault activity is the strongest,followed by Qingshan—Xiaotian,Meishan—Longhekou fault.Finally,through the analysis of the fault and seismic buffer,it is found that the strong earthquake occurred at the intersection of the fault.