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通过对近场以及远震数据的分析,估算了2010年中国青海地震(MW6.9)的破裂速度。破裂起始模型的计算结果与YUS台站实测近场地震图的比较显示出约为5.0km/s的快速超剪切破裂传播。根据使用包络线反褶积法和经验格林函数事件的远震分析,在震中东南6.5km和41.8km的地方鉴别出2个高频脉冲,说明为2个子事件。高频脉冲事件的地点和时间也显示出4.7～5.8km/s的超剪切破裂速度。超剪切破裂速度可能致使破裂向玉树镇扩展时产生了严重破坏。
Through the analysis of near-field and teleseismic data, the rupture rate of the 2010 Qinghai-Tibet earthquake (MW6.9) was estimated. The comparison of the calculated results of the rupture initiation model with the measured near-field seismograms at YUS station shows a rapid super-shearing rupture propagation of about 5.0 km / s. According to teleseismic analysis using envelope deconvolution and empirical Green’s function events, two high-frequency pulses were identified at 6.5 km and 41.8 km southeast of the epicenter, indicating two sub-events. The location and timing of HF events also show super shear failure rates of 4.7-5.8 km / s. The rate of super shear failure may cause serious damage to the expansion of Yushu town.