【摘要】 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。更多还原

【Abstract】 We study the changes of the region crustal deformation in Heilongjiang caused by Japan M_W 9.0 earthquake,combining GNSS and fixed deformation observation.The result shows that the earthquake increase the movement speed of GNSS sites,including HRBN and SUIY(HRBN from 25 mm/a to 29 mm/a;SUIY from 26 mm/a to 34 mm/a);Coseismic step observed by several types of observation instrunments at four sites of fixed deformation stations and GPS stations have consistency in the horizontal direction.The earthquake causes strain variety not only in the horizontal direction but also effect the vertical direction.Long baseline time series varieties indicate the large scale space strain change caused by M_W 9.1 earthquake is consistent with the tectono-strain field background in Heilongjiang region Heilongjiang region Heilongjiang region.And M_W 9.1 earthquake may accelerate the region’s surface strain accumulation.更多还原