东日本大地震前后陆态网络基准站形变研究

CMONOC Fiducial Station Deformation Before and After the Tohoku-Oki Earthquake

计算了东日本大地震前后各1a的"陆态网络"基准站GPS观测数据,得到了基准站的时间序列及其运动速度,讨论了较长时间尺度上东日本地震对"陆态网络"基准站造成的影响。结果表明,与震前相比,我国东北地区距震中较近的基准站的运动速度有加速倾向,运动方向偏向震中位置,华东地区、华南地区基准站的运动速度和方向在震前震后基本一致。

By calculating GPS observation data from some fiducial stations in CMONOC each year before and after the Tohoku-Oki earthquake, time series and velocity data from these fiducial stations obtained. On this basis, this paper discusses the impact of the Tohoku-Oki earthquake on the fiducial stations on a longer time scale. This research shows that as compared to the velocity before the earthquake, the fiducial stations in northeast China near the epicenter had a accelerating trend, and the movement direction tended towards the epicenter, while the movement velocity and direction of the fiducial stations in South and East China stayed almost consistent before and after the earthquake.