【摘要】 以山东地壳运动GPS观测网为基础,结合周边IGS提供的全球GPS观测资料,计算了2011年3月11日发生的日本9.0级巨震对山东所处地块产生的影响,并给出了该地区站点的真实运动轨迹和运动方式.结果显示:山东各GPS基准站受地震波影响产生的震时最大振幅超过0.2m,持续时间约160s;同震位移方向为东东南向,位移量最大超过10mm.日本9.0级地震对山东所在地块的影响主要是在水平方向,对垂直方向影响不大,它对山东主要断裂带-沂沭断裂带起到了拉张的作用,且N段幅度明显大于S段.根据地震前后站点时间序列的发展趋势来看,近期山东所处地块处于向西回调运动状态,推测震后3～5个月左右将恢复到震前的轨迹,为本地区的震情判定提供了可靠依据.更多还原

【Abstract】 Based on the Shandong Crustal Movement GPS Observation Network,combined with the global GPS data provided by IGS,we calculated the effects of Japan M9.0 huge earthquake on the Shandong area and provide the real motion track of stations.The result shows that: the maximum amplitude is more than 0.2 m at the GPS stations in Shandong during the earthquake,the wave movement lasted about 160s.The direction of co-seismic displacement is nearly south-easterly,and the maximum displacement is more than 10 mm.The effect of this earthquake on the Shandong area is mainly in horizontal direction,and it has a tensional effect on the Yishu Fault zone,and the tension amplitude of Northern part of the fault is obviously larger than Southern part.From the recent movement trend of GPS station,we can see that the blocks of Shandong area are moving back to west,so we speculate that the movement pattern will return to the former in about 3~5 month after the Earthquake,this work can provide a reliable basis for earthquake monitoring in this area.更多还原