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2015年4月25日尼泊尔地震波场传播及烈度初步模拟分析

DOI: 10.6038/cjg20150531, PP. 1812-1817

Keywords: 尼泊尔地震,强地面运动,地震烈度

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Abstract:

2015年4月25日尼泊尔发生Mw7.9地震.本文采用三维曲线坐标网格有限差分方法,依据USGS给出的震源运动学反演结果和震源区域地形数据,模拟了尼泊尔地震波场传播过程,得到震源区域烈度分布模拟结果,与实际观测的地表峰值速度(PGV)大体吻合.结果表明:地震烈度的空间分布整体上受控于震源的单边破裂特征,高烈度区域主要分布在破裂传播方向上,即震源东半部.震源南侧到东南侧近场,由于受到震源和地形的双重影响,形成最大烈度分布区域,最大烈度约为IX.南侧平原受低速沉积层影响形成高烈度区域.震源西侧及盆地内烈度相对较低.

References

[1]  Gesch D B, Verdin K L, Greenlee S K. 1999. New land surface digital elevation model covers the earth. Eos, Transactions, American Geophysical Union, 80(6): 69-70.
[2]  Laske G, Masters G, Ma Z T, et al. 2013. Update on CRUST1.0-A 1-degree global model of earth''s crust. Geophys. Res. Abstracts, 15, Abstract EGU2013-2658, 2013.
[3]  Lee S J, Chen H W, Huang B S. 2008. Simulations of strong ground motion and 3D amplification effect in the Taipei Basin by using a composite grid finite-difference method. Bull. Seismol. Soc. Am., 98(3): 1229-1242.
[4]  USGS. 2015. 《M7.8-34 km ESE of Lamjung, Nepal》. http://www.earthquake.usgs.gov/earthquakes/eventpage/us20002926 general_summary[2015-04-.
[5]  Xinhuanet. 2015a. 《The death in the Nepal Earthquake reached 4262》. http://news.xinhuanet.com/world/2015-04/28/c_1115115199.htm[2015-04-.
[6]  Xinhuanet. 2015b. 《Avalanches occurred on Everest Mountain in The Nepal Earthquake, nobody hurt on the north slope》, http://news.xinhuanet.com/2015-04/25/c_127733203.htm[2015-24-.
[7]  Zhang W, Chen X F. 2006. Traction image method for irregular free surface boundaries in finite difference seismic wave simulation. Geophys. J. Int., 167(1): 337-353.
[8]  Zhang W, Shen Y, Chen X F. 2008. Numerical simulation of strong ground motion for the Ms8.0 Wenchuan earthquake of 12 May 2008. Science in China Series D: Earth Science, 51(12): 1673-1682.
[9]  Zhang W, Zhang Z G, Chen X F. 2012. Three-dimensional elastic wave numerical modelling in the presence of surface topography by a collocated-rid finite-difference method on curvilinear grids. Geophys. J. Int., 190(1): 358-378.

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