| Global shear stress pattern in main seismic active belts |
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| 引用本文： | 肖磊,陈培善.Global shear stress pattern in main seismic active belts[J].地震学报(英文版),1997,10(2):161-171. |
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| 作者姓名： | 肖磊 陈培善 |
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| 作者单位： | LEI XIAO PEI SHAN CHEN Institute of Geophysics，State Seismological Bureau，Beijing 100081，China |
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| 摘 要： | ＧｌｏｂａｌｓｈｅａｒｓｔｒｅｓｐａｔｅｒｎｉｎｍａｉｎｓｅｉｓｍｉｃａｃｔｉｖｅｂｅｌｔｓＬＥＩＸＩＡＯ（肖磊）ＰＥＩ－ＳＨＡＮＣＨＥＮ（陈培善）ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃｓ，ＳｔａｔｅＳｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕ，Ｂｅｉ...
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| 收稿时间： | 19 December 1995 |
| 修稿时间： | 23 September 1996 |
Global shear stress pattern in main seismic active belts |
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| LEI XIAO PEI SHAN CHEN Institute of Geophysics,State Seismological Bureau,Beijing ,China.Global shear stress pattern in main seismic active belts[J].Acta Seismologica Sinica(English Edition),1997,10(2):161-171. |
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| Authors: | LEI XIAO PEI SHAN CHEN Institute of Geophysics State Seismological Bureau Beijing China |
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| Institution: | (1) Institute of Geophysics, State Seismological Bureau, 100081 Beijing, China |
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| Abstract: | Based on the relationship between body wave magnitued m b and seismic moment M 0 presented by PEI SHAN CHEN (1981), by using the moment tensor and focal mechanism solution in the earthquake reports of EDR, a global shear stress pattern including shear stress values and directions of P and T principal axis was obatained. The distribution of ambient shear stress values in the globe is: the highest in intraplate followed by subduction zone, and the lowest in oceanic ridge. The horizontal directions of the maximum principal stresses we got are coincident very well with the result of Zoback (1989). The detail analysis of the stress state in Tonga region shows that: The subduction slab bends down in shallow by press and bends up in deep because of the resistance from deeper part. Between them, the slab is in an equilibrum state. After analysizing the global stress distribution, we got the result that: the plate is driven by a drag force from under its bottom, the plate motion results in its extensional state in oceanic ridge and compressive state in subduction zone. |
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| Keywords: | seismic active belt shear stress seismic moment |
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