地震工程学报2016，Vol.38Issue(5)：822-829,8.DOI:10.3969/j.issn.1000-0844.2016.05.0822
新疆南天山西段震群活动特征分析
Characteristics of Earthquake Swarms in Western Part of South Tianshan,Xinjiang
摘要
Abstract
The small earthquake swarm activity level in South Tianshan,Xinj iang,was relatively high from March 2008 to December 2013.In this paper,31 small earthquake swarms occurring in this area are systematically studied,the parameter characteristics of earthquake swarms are summarized,the relationship between small earthquake swarms and the occurrence of future moderately strong earthquakes is discussed,and criteria for precursory earthquake swarms are analyzed and tested.Results show that:(1 ) earthquake swarms in South Tianshan are concentrated in several regions,the magnitudes of most are 2.0~3.9,and the largest magnitude of each swarm is mostly about ML3.5.Seven swarms have a total magnitude of ML≥4.0 with a max-imum value of ML4.9 and there are less than 20 earthquakes for most earthquake swarms with a duration of less than seven days.(2 )The activity of earthquake swarms is mainly concentrated near Atushi.75% of the swarms are accompanied with M>5.0 earthquakes two months after their occurrence,and the epicenters of these medium-strong earthquakes are principally located in the intersection of Kashi and Wuqia.The corresponding ratio of the magnitude of earthquake swarmsand future medium-strong earthquakes has no obvious correlation with the magnitude of corresponding earthquakes.There is also no good relationship between the number of earthquakes in an earthquake swarm and the corresponding ratio.(3 )Results using the combined method of U-K and U-ρare preferable for determining the type of earthquake swarm,and the correct rate accounts for about 32% of all results.Results of analysis provide a reference for determining whether an earthquake swarm has precursory characteristics or not.关键词
震群/参数特征/前兆震群判定/南天山西段Key words
earthquake swarms/parameters characteristics/determination of the precursory swarm/western part of South Tianshan分类
天文与地球科学引用本文复制引用
张琳琳,宋春燕,温少妍..新疆南天山西段震群活动特征分析[J].地震工程学报,2016,38(5):822-829,8.基金项目
中国地震局震情跟踪定向工作任务(2015010122) （2015010122）
新疆地震局科学基金(201404) （201404）
