| 扁率应力与地震 |
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| 引用本文： | 杨学祥.扁率应力与地震[J].东北地震研究,1992(4). |
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| 作者姓名： | 杨学祥 |
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| 作者单位： | 长春地质学院 长春 |
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| 摘 要： | 地球扁率的实测值要比理论值大,这证明地球内部还存在着微小的应力差。经计算,扁率变化所产生的地球形变与冰期中由地壳均衡所产生的地球形变在数值上大体相等。这表明冰期是地球扁率变化的一个原因。地壳均衡不仅能产生地壳的垂直运动,而且能产生地壳的水平运动,因而也是海底扩张、大陆漂移的力源之一。
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| 关 键 词： | 扁率 大地水准面 应力 地壳均衡 冰期 |
FLATTENING INTERNAL STRESS AND EARTHQUAKE |
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| Yang Xuexiang Changchun College of Geology.FLATTENING INTERNAL STRESS AND EARTHQUAKE[J].Seismological Research of Northeast China,1992(4). |
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| Authors: | Yang Xuexiang Changchun College of Geology |
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| Institution: | Yang Xuexiang Changchun College of Geology,130026 |
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| Abstract: | The actual flattening of Earth ellipsoid is 1/298.25, which was measured by man-
made satelites. It is bigger then the flattening 1/299.8 which was calculated with thcory
of internal force field. It has proved that there is a few stress difference in the earth. The
earth deformation which results from change of flattening and the deformation because of
crustal isostasy in glacial period have almost same value by calculation. Ice age, therefore,
is a cause of change of earth ellipticity at least. Crustal isostasy not only can lead to vertical
crustal motion, but can generate horizontal motion. Consequently, is also is one of force
source to drive ocean floor spreading and drift of continents. |
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| Keywords: | flattening geoid stress crustal isostasy ice age |
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