WANG Zhihao,SHAN Weifeng,TENG Yuntian.Study on the temporal and spatial evolution of earthquakes in CSES[J].,2021,(02):223-231.





Study on the temporal and spatial evolution of earthquakes in CSES
王志浩1 单维锋12 滕云田2
1. 防灾科技学院应急管理学院, 河北 廊坊 065201;
2. 中国地震局地球物理研究所, 北京 100081
WANG Zhihao1 SHAN Weifeng12 TENG Yuntian2
1. School of Emergency Management, Institute of Disaster Prevention, Langfang 065201, China;
2. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
temporal and spatial evolution of earthquakespatial statisticsstandard deviational ellipsespatial autocorrelation analysis
We can master the evolution features of earthquakes in an area by analyzing the temporal and spatial evolution process of earthquake events in the certain area, which can provide a theoretical basis for evaluating the risk of earthquakes in this area. In this paper, we explore the temporal and spatial evolution law of earthquake events in this area by using the spatial statistical methods such as weighted average center, standard deviational ellipse and global spatial autocorrelation based on the data of earthquake events with magnitude 3.0 or larger from 2000 to 2019 in CSES. The results show that (1) After the Wenchuan earthquake, the frequency of earthquakes in this area shows the trend of falling down, and the earthquake activity has gradually weakened, (2) the weight average center of the earthquake shows a "turn-back" type movement law, which is constantly going back and forth from northeast to southwest, (3) the direction of spatial distribution of earthquakes shows a "northwest-southeast" pattern, which is basically consistent with the direction of the Yingxiu-Beichuan Fault, and (4) the spatial distribution pattern of earthquake events in this area is mainly clustering pattern, and it is in the rising stage, but the rising speed is relatively slow.


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