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| 引用本文： | 唐磊,邱泽华,阚宝祥.???????????????????????????[J].大地测量与地球动力学,2008,28(2):56-60. |
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| 作者姓名： | 唐磊 邱泽华 阚宝祥 |
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| 作者单位： | 中国地震局地壳应力研究所,北京,100085 |
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| 基金项目： | 国家自然科学基金
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地震科学联合基金 |
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| 摘 要： | ????????YRY??2????????????????????о????????????????????????????????????????????????????????????????????????????2004??12??26???2005??3??28???????????????δ???????????????????????????0T11??0T18????????????ε????????仯??????????????ε???????0T11??0T18???????????????????????仯???С????????????????????????????????????????????2???????????????????????????????ù????????
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| 关 键 词： | ????????? ???? ???????? ????????? ??????????? |
| 文章编号： | 1671-5942(2008)02-0056-05 |
| 修稿时间： | 2008年1月15日 |
ANALYSIS OF SHEAR STRAIN ORIENTATION OF EARTH'S TORSIONAL OSCILLATION EXCITED BY TWO INDONESIA EARTHQUAKES |
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| Tang Lei,Qiu Zehua,Kan Baoxiang.ANALYSIS OF SHEAR STRAIN ORIENTATION OF EARTH''''S TORSIONAL OSCILLATION EXCITED BY TWO INDONESIA EARTHQUAKES[J].Journal of Geodesy and Geodynamics,2008,28(2):56-60. |
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| Authors: | Tang Lei Qiu Zehua Kan Baoxiang |
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| Institution: | Institute of Crustal Dynamics，CEA，Beijing 100085 |
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| Abstract: | Using observations of the YRY 2 borehole shear strainmeter,we studied maximum shear strain orientation of the earth’s torsional oscillation excited by two Sumatra earthquake occurred on December 26,2004 and March 28,2005. Firstly, we did in situ calibration for the data of borehole shear strainmeter and then detected the torsional oscillations. It is found that fundamental torsional modes 0T11～0T18 were very obvious and variation trend of the two earthquakes’ amplitude were in agreement with each others,and variations of maximum shear strain orientations with time of fundamental torsional modes
0T11～0T18 of the two Sumatra earthquakes are small. Through the comparison,we found that the D value of the mean measured value with theoretical anticipation value was only 2°. On the one hand,it comfirmed the theoretical model, on the other hand it also comfirmed that this observation was reliable. |
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| Keywords: | borehole shear strainmeter in-situ calibration earth's free torsional oscillation the maximum shear strain orientation Sumatra earthquake |
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