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结合GNSS和黑龙江地区定点形变观测,分析日本2011年3月11日M_W 9.0地震对黑龙江地区地壳形变的影响。结果显示:日本M_W 9.0地震引起哈尔滨站、绥阳站震后2年内运动速率明显增加(哈尔滨站增大4 mm/a,绥阳站速率增大6 mm/a);定点形变与GPS观测到的同震效应至少在4个台站多种仪器均具有较好的一致性;日本M_W 9.0地震不仅引起区域水平向应变变化,对垂直向也产生一定影响;长基线变化反映出日本M_W 9.0地震引起的大空间尺度应变变化与黑龙江地区长期构造应力场背景一致,该地震对黑龙江地区地表应变积累可能有增强影响。
Combined with the fixed-point deformation observation in GNSS and Heilongjiang region, the impact of Japan M_W 9.0 earthquake on crustal deformation in Heilongjiang region on March 11, 2011 was analyzed. The results show that the movement rate of Harbin and Suiyang stations increased significantly after M_W 9.0 earthquake (4 mm / a in Harbin and 6 mm / a in Suiyang respectively) within 2 years after the earthquake; and the deformation of fixed point and GPS observations Of the coseismic effects of at least four stations at least a variety of instruments have a good consistency; Japan M_W 9.0 earthquake not only caused regional horizontal strain changes, the vertical also have some impact; long baseline changes reflect the Japan M_W 9.0 earthquake The large scale-scale strain changes caused by this earthquake are consistent with the long-term tectonic stress field in Heilongjiang region. The earthquake may have an impact on the surface strain accumulation in Heilongjiang region.