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首页> 外文期刊>Journal of geodynamics >Geo-center movement caused by huge earthquakes (vol 76, pg 1, 2014)
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Geo-center movement caused by huge earthquakes (vol 76, pg 1, 2014)

机译:巨大地震引起的地心运动(2014年第76卷,第1页)

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Sun and Dong (2014) studied the co-seismic geo-center movement using dislocation theory for a spherical earth model. However, they incorrectly considered the maximum vertical co-seismic displacement as the rigid geo-center motion (i.e., they did not separate the rigid shift and elastic deformation). In this paper, we correct Sun and Dong (2014) by using a new approach. We now define the geo-center motion as a shift of the center of figure of the Earth relative to the center of mass of the Earth. Furthermore, we derive new formulas to compute the co-seismic geo-center and inner core's center movements caused by huge earthquakes. The 2004 Sumatra earthquake and the 2011 Tohoku-Oki earthquake changed the geo-center by 1-4 mm and about 2 mm, respectively, and caused the inner core's center to displace by about 0.05 mm and 0.025 mm, respectively. (C) 2015 Elsevier Ltd. All rights reserved.
机译:Sun和Dong(2014)使用位错理论研究球形地球模型的同震地心运动。但是,他们错误地将最大垂直同震位移视为刚性地心运动(即,他们没有将刚性位移和弹性变形分开)。在本文中,我们使用新方法纠正了Sun和Dong(2014)。现在,我们将地心运动定义为地球图形中心相对于地球质心的偏移。此外,我们推导了新的公式来计算由大地震引起的同震地心和内心的中心运动。 2004年的苏门答腊地震和2011年的东北冲地震分别改变了地心1-4毫米和约2毫米,并使内核的中心分别移位了0.05毫米和0.025毫米。 (C)2015 Elsevier Ltd.保留所有权利。

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