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地震 ›› 2002, Vol. 22 ›› Issue (3): 89-94.

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伽师强震群震源机制与区域应力场特征

杨成荣1, 单新建1,2, 何玉梅3, 朱燕1, 马宝柱1   

  1. 1.新疆自治区地震局,新疆乌鲁木齐 830011;
    2.中国地震局地质研究所, 北京 100029;
    3.中国科学院地质与地球物理研究所,北京 100101
  • 收稿日期:2001-08-13 修回日期:2002-03-05 出版日期:2002-07-31 发布日期:2021-12-21
  • 作者简介:杨成荣(1954-),男,新疆奇台人,工程师,主要从事地震监测和地震活动性分析等研究工作。
  • 基金资助:
    “九五”中国地震局科研攻关项目(96-913-07-04)

Focal mechanism of Jiashi strong earthquakeswarm and characteristics of the regional stress field

YANG Cheng-rong1, SHAN Xin-jian1, 2, HE Yu-mei3, ZHU Yan1, MA Bao-zhu1   

  1. 1. Seismological Bureau of Xinjiang Uygur Autonomous Region, Urumqi 83011, China;
    2. In-stitute of Geology, CSB, Beijing 100029, China;
    3. Institute of Geology and Geophysics, CAS, Beijing 100101, China
  • Received:2001-08-13 Revised:2002-03-05 Online:2002-07-31 Published:2021-12-21

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摘要： 利用所搜集新疆地震台网各种短周期Pg 和Pn 波初动方向资料和中国数字地震台网(CDSN)、全球数字地震台网(GDSN)及中亚地区部分资料,计算了新疆阿图什1996年6. 9级和1998年6. 0级地震、伽师1997~ 1998年6次强震,以及MS≥ 4. 0中小地震震源机制解48个。结合伽师强震群地震时空分布、地震烈度,对该区域应力场进行了探讨。结果表明,该区域应力场主压应力方向为SW-NE向。

关键词: 伽师强震群, 震源机制解, 地震烈度, 区域应力场

Abstract: Employing the data of short-period Pg and Pn wave onsets from Xinjiang Seismic Network, China Digital Seismic Network, Global Digital Seismic Networks, and those from Mid-Asian region, we obtained 48 focal mechanismsolutions, among them 6 strong earth-quakes from 1997 to 1998 and the others are MS≥ 4. 0 moderately small earthquakes. We ex-plored the characteristics of regional stress field with the spatial-tem poral distribution and seis-mic intensity of the Jiashi strong earthquakeswarm. The result shows that the principal com-pressional stress field is in the SW-N E direction.

Key words: Jiashi strong earthquakeswarm, Focal mechanismsolution, Seismic intensity, Regional stress field

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