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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.
On April 14, 2010, an MS7.1 strong earthquake occurred in Yushu, Qinghai Province. According to the source parameters of 5 sets of Yushu earthquakes published by 3 agencies both at home and abroad, the Coulomb failure stress changes of Yushu earthquake were calculated. The effects of source parameters on Coulomb failure Rupture stress and its relationship with aftershock activity.The results show that due to the differences in source parameters of different sources, the computed images of Coulomb failure stress change also have different degrees of difference, thus affecting the relationship between Coulomb failure stress changes and aftershock activity. Among the fault source parameters, the influence of fault slip angle and dislocation amount is greater than other parameters, and the statistics of aftershock statistical time also affect the relationship between Coulomb failure stress and aftershock activity.