基于GIS的云南地区地震与断裂带相关性分析

Analysis of Correlation Between Earthquakes and Faults in Yunnan Based on GIS

为了解地震的空间分布规律,准确、及时掌握地震讯息,对云南地区2001至2014年地震数据进行了分析,探明了该区域断裂带与地震活动的相关性.研究表明,该地区有大约52.64%的地震发生在以20km为半径的断裂带缓冲区内,中强级以上地震主要发生在断裂带10km缓冲区内;地震活动主要集中在中甸大理地震带和小江地震带,且在两组断裂带交汇处地震发生频率很高.

The seismic data of Yunnan from 2001 to 2014 has been analyzed in this paper for understanding the spatial distribution of earthquakes and grasping the earthquake information accurately and timely.The correlation between faults and seismic activities in the region has been ascertained.The results show that about 52.64 percent of earthquakes break out in the fault buffer zone with a radius of 20km and earthquakes above medium intensity level occur mainly in the fault buffer zone with a radius of 10km.Seismic activities occur mainly in the earthquake zones of Zhongdian Dali and Xiaojiang,and have a high frequency at the intersection between them.