| 根据大地震前后应力轴偏转和应力降求取应力量值的研究 |
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| 引用本文： | 万永革.根据大地震前后应力轴偏转和应力降求取应力量值的研究[J].地震学报,2006,28(5):472-477. |
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| 作者姓名： | 万永革 |
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| 作者单位： | 1）中国北京100081中国地震局地球物理研究所 2）中国河北065201防灾科技学院 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，地震科学联合基金 |
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| 摘 要： | 为求解震源处应力量值,运用大地震造成的应力方向偏转和地震应力降给出了求取震源处应力大小的方法.地震前后的应力方向可根据大量前震和余震震源机制统计给出;地震应力降可通过地震波或地壳形变资料的震源破裂反演研究得到.该研究对地震动力学具有一定的意义.
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| 关 键 词： | 应力量值 地震应力降 应力轴转向 |
| 文章编号： | 0253-3782(2006)05-0472-06 |
| 修稿时间： | 2006年3月9日 |
STUDY ON DETERMINATION OF STRESS LEVEL BY SEIS MIC STRESS DROPS AND THE STRESS AXIS DEFLEC TIONS BEFORE AND AFTER LARGE EARTHQUAKES |
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| Wan Yongge.STUDY ON DETERMINATION OF STRESS LEVEL BY SEIS MIC STRESS DROPS AND THE STRESS AXIS DEFLEC TIONS BEFORE AND AFTER LARGE EARTHQUAKES[J].Acta Seismologica Sinica,2006,28(5):472-477. |
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| Authors: | Wan Yongge |
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| Abstract: | To obtain the stress level at the earthquake source, this paper sets forth the solution of the stress magnitude at the earthquake source by seismic stress drop and the stress axis deflections before and after large earthquakes. The pre-seismic and post-seismic stress direction can be statistically determined by a large collection of foreshock and aftershock focal mechanism data while the stress drop can be determined through the source fracture inversion from seismic wave data or crust deformation data. The paper attempts to make a fundamental contribution to seismic dynamics. |
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| Keywords: | stress level seismic stress drop stress axis deflection |
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