摘要
2005年9月23日至10月20日克孜尔地区发生了小震群事件,其中发生MS4以上地震5次,震群中最大地震震级为MS4.9。此次震群活动强度大、频次高,因此具有一定的显著性和特殊性。在尽可能完整地收集此次震群地震目录资料基础上,从震群的时序特征、空间分布特征、能量释放特征、前兆特征等方面分析了此次震群的情况。分析结果表明,此次震群为K-ρ型前兆震群,震群主要受到近南北向水平挤压作用力,发震构造既不是克孜尔(F2)断裂也不是喀桑托开断裂,很有可能与本地区的隐伏断裂有关。
From Sept. 23 to Oct. 20, 2005, the small earthquake swarm occurred on the Kizil are. In the swarm, there are 5 earthquakes with above Ms4. The biggest magnitude was Ms4.9. The magnitude of this earthquake swarm activity is big, and the frequency is high. And on Aug. 25, 2005 has 1 Ms5.2 earthquake in Bachu. So it has certain notability and particularity. Based on earthquake catalogue data as possible as collecting completely in this earthquake swarm, we analyzed this swarm from time sequence, spatial distribution, energy release, precursory characteristics of the earthquake swarm. The analysis result showed that this earthquake swarm is the precursory earthquake swarm of the K-p type. And the earthquake swarm controlled mainly by the level compressive action of near NS. The structure of occurring earthquakes is not the Kizil （F2） fault. And it is not Kasangtuokai fault. However, it is possible very much to relate with the underlying fault of this local.
出处
《内陆地震》
2006年第4期372-377,共6页
Inland Earthquake
关键词
新疆
拜城
震群特征
震源机制解
形变前兆
Xinjiang
Baicheng
The characteristic of earthquake swarm
The focal mechanism solution
Deformation precursor
