深源地震折合能量的标度性及其与深度的关系

doi:10.7523/j.issn.2095-6134.2005.3.004

中国科学院大学学报 ›› 2005, Vol. 22 ›› Issue (3): 279-285.DOI: 10.7523/j.issn.2095-6134.2005.3.004

深源地震折合能量的标度性及其与深度的关系

吴忠良^1,2

1. 中国科学院研究生院计算地球动力学实验室, 北京 100049;
2. 中国地震局地球物理所, 北京 100081

收稿日期:2004-07-15 修回日期:2004-10-12 发布日期:2005-05-15

Scaling of Reduced Energy for Deep-Focus Earthquakes and its Apparent Depth Dependence

WU Zhong-Liang^1,2

1. Laboratory of Computational Geodynamics, Graduate School of the Chinese Academy of Sciences, Beijing 100049, China;
2. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China

Received:2004-07-15 Revised:2004-10-12 Published:2005-05-15
Supported by:
supported by National Natural Science Foundation of China(40274013)

摘要/Abstract

摘要：

利用1987年1月至2001年12月的哈佛CMT目录和美国NEIC地震辐射能量目录,研究了全球范围内震源深度大于70km的地震的辐射能量与地震矩之比(或称折合能量)随地震矩的变化及其与震源深度之间的关系.结果表明对震源深度为70～400km的地震,折合能量随地震矩的增加而降低;对于深度大于400km的地震,折合能量随地震矩的增加而增加.这一特征与浅源地震似乎很不相同.

关键词: 深源地震, 折合能量, 辐射能量, 地震矩, 视应力

Abstract:

The ratio of radiated energy over seismic moment, or the so called reduced energy, is studied for global deep-focus earthquakes deeper than 70km using the scalar seismic moment in the Harvard CMT catalogue and the radiated energy estimated by NEIL from January 1987 to December 2001. The scaling of reduced energy versus seismic moment is obtained for different depth ranges, respectively. It is olxerved that for earthquakes with depths between 70km and 400km, reduced energy decreases with seismic moment,while for earthquakes with depths beyond 400km, reduced energy increases with seismic moment. This characteristic is apparently different from that of shallow earthquakes.

Key words: deep-focus earthquakes, reduced energy, radiated energy, seismic moment, apparent stress

中图分类号:

P315

吴忠良. 深源地震折合能量的标度性及其与深度的关系[J]. 中国科学院大学学报, 2005, 22(3): 279-285.

WU Zhong-Liang . Scaling of Reduced Energy for Deep-Focus Earthquakes and its Apparent Depth Dependence[J]. , 2005, 22(3): 279-285.

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深源地震折合能量的标度性及其与深度的关系

Scaling of Reduced Energy for Deep-Focus Earthquakes and its Apparent Depth Dependence

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