摘要
分析研究了南天山地震带构造环境、中强地震活动震源机制解、中强地震时空分布以及拜城周围小震群活动与中强地震的关系。结果表明:南天山东段中强震震源断错以倾滑逆断为主,主压应力P轴由西到东呈扇形分布;相距较近的库车与拜城地区地震活动存在较大差异,但均存在明显的成丛性分布特点;拜城地区中强地震分布呈北西向可能预示着该区存在隐伏断裂,小震群活动则可能反映了局部中强震对周围次级小构造的影响。
We analyzed and studied the structure environment, the epicenter mechanisms of medium-strong earthquakes, time and space distribution of medium-strong earthquakes and the relation between the small earthquakes clusters around Baicheng and medium-strong earthquakes in the seismic field of south Tianshan mountain. The result show, most of the medium-strong earthquakes faults are dip-slip reversed, distribution of the main stress P axis is sector from west to east; there are large difference between Kuche and Baicheng region in seismic activities, but the characteristic of cluster is same in the two region; the distribution of medium-strong earthquakes is NW direction in Baicheng region, it show, there can have a concealed fault; small earthquake clusters＇ activities can reflect the effect that local medium-strong earthquakes to the secondary small structure around it.
出处
《内陆地震》
2005年第2期156-163,共8页
Inland Earthquake
关键词
南天山东段
地震活动
时空分布
震源机制解
East of the south Tianshan mountain
Seismic activity
Time and space distribution
Epicenter mechanism
