| Gravity and gravity gradient changes caused by a point dislocation |
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| 引用本文： | 黄建梁,李辉,李瑞浩.Gravity and gravity gradient changes caused by a point dislocation[J].地震学报(英文版),1995,8(1):89-99. |
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| 作者姓名： | 黄建梁 李辉 李瑞浩 |
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| 作者单位： | Institute of Seismology，State Seismological Bureau，Wuhan 430071，China |
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| 摘 要： | ＧｒａｖｉｔｙａｎｄｇｒａｖｉｔｙｇｒａｄｉｅｎｔｃｈａｎｇｅｓｃａｕｓｅｄｂｙａｐｏｉｎｔｄｉｓｌｏｃａｔｉｏｎＪｉａｎ－ＬｉａｎｇＨＵＡＮＧ；ＨｕｉＬＩａｎｄＲｕｉ－ＨａｏＬＩ（黄建梁，李辉，李瑞浩）（ＩｎｓｔｉｔｕｔｅｏｆＳｅｉｓｍｏｌｏｇｙ，...
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| 收稿时间： | 2 August 1993 |
| 修稿时间： | 20 October 1994 |
Gravity and gravity gradient changes caused by a point dislocation |
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| Jian-Liang HUANG, Hui LI and Rui-Hao LI.Gravity and gravity gradient changes caused by a point dislocation[J].Acta Seismologica Sinica(English Edition),1995,8(1):89-99. |
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| Authors: | Jian-Liang HUANG Hui LI and Rui-Hao LI |
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| Institution: | (1) Institute of Seismology, State Seismological Bureau, 430071 Wuhan, China |
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| Abstract: | In this paper we studied gravitational potential, gravity and its gradient changes, which are caused by a pointdislocation, and gave the concise mathematical deduction with definite physical implication in dealing with thesingular integral at a seismic source. We also analysed the features of the fields of gravity and gravity gradient,gravity-vertical-displacement gradient. The conclusions a re: (1) Gravity and gravit y gradient changes are verysmall with the change of vertical positionl (2) Gravity change is much greater than the gravity gradient changewhich is not so distinct; (3) The gravity change due to redistribution of mass accounts for 10-50 percent of thetotal gravity change caused by dislocation. The signs (positive or negative) of total gravity change and verticaldisplacement are opposite each other at the same point for strike slip and dip slip 1 (4) Gravity-vertical displacement-gradient is not constantl it manifests a variety of patterns for different dislocation modelsl (5) Gravityvertical-displacement-gradient is approximately equal to a pparent gra vit y-- vert ical- displacement -gradient. |
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| Keywords: | gravity field gradient gravity Potential dislocation |
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