Influence of source parameters of the 2011 Yushu earthquake on its Coulomb failure stress calculationand on aftershock activity
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摘要: 2010年4月14日青海省玉树发生MS7.1强震， 根据国内外3个机构公布的5套玉树地震震源参数，计算了玉树地震产生的库仑破裂应力变化，研究了震源参数的差异对库仑破裂应力变化及其与余震活动关系的影响． 结果表明，由于不同来源震源参数存在差异，计算得到的库仑破裂应力变化图像也存在不同程度差异，从而影响库仑破裂应力变化与余震活动的关系．在震源断层参数中，断层滑动角和位错量的影响大于其它参数．此外还发现对余震统计时间的长短也会影响库仑破裂应力变化与余震活动关系的统计结果．Abstract: On April 14, 2010, the Yushu MS7.1 earthquake occurred in Qinghai Province, China. Based on five sets of source parameters published by three institutions at home and abroad, we calculated Coulomb failure stress (CFS) change induced by Yushu earthquake occurrence, and studied the influence of different source parameters on the calculated CFS change and its statistic relation with aftershocks. The result shows that the calculated CFS change patterns are different due to different source parameters, thus the relation between CFS change and aftershock activity is affected. In the source parameters the influence of fault slip angle and dislocation is greater than that of other parameters. In addition, the time length for making aftershock statistical analysis also affects the relation between CFS change and aftershock activity.
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期刊类型引用(8)
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