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。
We study the changes of the region crustal deformation in Heilongjiang caused by Japan Mw 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 ob- served 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 Mw 9.1 earthquake is consistent with the tectono-strain field background in Heilongjiang region Heilongjiang re- gion Heilongjiang region. And Mw 9.1 earthquake may accelerate the regionls surface strain accumulation.
出处
《地震地磁观测与研究》
2014年第5期190-195,共6页
Seismological and Geomagnetic Observation and Research
基金
黑龙江省地震局科研项目(编号:201404)资助
黑龙江省陆态网络应用系统的建设与试验研究项目资助
