摘要
依据统计极大值地震活动序列的小波时频功率谱,探讨了震区岷山断块隆起地震趋势,分析了震区新构造特征、主要活动断裂与历史地震、震源机制解显示的应力场特征以及现代仪器记录的极大值地震序列的空间展布,认为九寨沟7.0级地震是虎牙断裂北北西继续延伸产生左旋走滑破裂的结果。
The neo-tectonic characteristics,main active faults and historical earthquakes in Jiuzhaigou area are analyzed.Features of tectonic stress field revealed by focal mechanism solution and spatial distribution of maximum earthquake sequence recorded by modern instruments are also analyzed.The seismogenic structure is discussed.Jiuzhaigou Ms7.0 earthquake results from the rupture of a sinistral Huya NNW fault that is continuously fault.The interdecadal activity characteristics of maximum earthquake sequences recorded by modem instruments are studied by the method of the time-frequency power spectrum of wavelet transform.
作者
薛丁
XUE Ding(Seismological Bureau of Inner Mongolia Autonomous Region,Hohhot 010010,China)
出处
《四川地震》
2018年第1期5-9,共5页
Earthquake Research in Sichuan
关键词
九寨沟7.0级地震
地震构造
地震活动
小波功率谱
极值地震
Jiuzhaigou Ms7.0 earthquake
earthquake structure
earthquake activity
wavelet power spectrum
extreme earthquake
