| 2001年昆仑山口西8.1级大地震前后震源区应力水平估计a |
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| 引用本文： | 陈学忠.2001年昆仑山口西8.1级大地震前后震源区应力水平估计a[J].地震学报,2005,27(6):605-609. |
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| 作者姓名： | 陈学忠 |
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| 作者单位： | （中国北京100081中国地震局地球物理研究所） |
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| 摘 要： | 提出了估计地震前后震源区应力水平的方法. 以2001年昆仑山口西8.1级地震为例， 估算了地震前后震源区的应力水平. 结果表明:地震前震源区的应力值为6.3~8 MPa；地震发生后，震源区的应力值为5~6.7 MPa. 震后震源区的应力仅下降了20%左右.
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| 关 键 词： | 昆仑山口西大地震 震源区 应力水平 |
| 文章编号： | 0253-3782(2005)06-0605-05 |
| 修稿时间： | 2005年2月1日 |
ESTIMATION OF THE STRESS LEVELS IN THE FOCAL REGION BEFORE AND AFTER THE 2001 M8.1 WESTERN KUNLUN MOUNTAIN PASS EARTHQUAKE |
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| Chen Xuezhong.ESTIMATION OF THE STRESS LEVELS IN THE FOCAL REGION BEFORE AND AFTER THE 2001 M8.1 WESTERN KUNLUN MOUNTAIN PASS EARTHQUAKE[J].Acta Seismologica Sinica,2005,27(6):605-609. |
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| Authors: | Chen Xuezhong |
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| Abstract: | A method is proposed to estimate the stress level in the focal region of an earthquake. Taking the 2001 M8. 1 western Kunlun Mountain Pass earthquake as an example, its stress level in the focal region before and after is estimated by this method. The results show that the stress level in the focal region is approximately 6. 3-8 MPa just prior to the initiation of this event and about 5-6. 7 MPa remaining in the focal region after its occurrence. The stress in the focal region decreased by roughly twenty percent after this event. |
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| Keywords: | western Kunlun Mountain Pass earthquake focal region stress level |
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