Characteristics of the ML3.9 Jinzhai,Anhui, earthquake swarm sequence in 2014
Ni Hongyu
Shen Xiaoqi
Hong Dequan
Li Junhui
Zheng Haigang
Zhao Peng
Abstract：This paper relocated the ML 3.9 Jinzhai,Anhui,earthquake sequence in 2014 with double-difference earthquake location algorithm firstly,and then calculated the focal mechanisms of stronger earthquakes of the swarm by using Snoke and CAP methods,respectively.Finally,the spatio-temporal evolution-ary characteristics of source parameters were analyzed.The results show that the Jinzhai earthquake swarm sequence was distributed in the dense scope of 2 km×2 km without predominant direction.The focal depth is very shallow, being 3—7 km.In addition,the focal mechanisms of larger earthquakes are basically consistent with each other.The strikes of two nodal planes are sepa-rately along the direction of NW and NNE,and the dips of two nodal planes are very high,suggesting the Jinzhai earthquake swarm sequence was caused by strike-slip faulting under the action of horizontally compressed nearly in E-W direction and horizontally extended nearly in N-S direction.
Keywords：Jinzhai earthquake swarmdouble-difference earthquake location algorithmfocal mechanism solutionCAP methodSnoke method
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：12( 925-936 )