### Seafloor crustal deformation data along the subduction zones around Japan obtained by GNSS-A observations version Jan. 10, 2020 ### Citation: Yokota, Y. Ishikawa, T. Watanabe, S. (2018): Seafloor crustal deformation data along the subduction zones around Japan obtained by GNSS-A observations. Scientific Data, 5:180182, https://doi.org/10.1038/sdata.2018.182 Yokota, Y. Ishikawa, T. Watanabe, S. (2018): PANGAEA https://doi.org/10.1594/PANGAEA.885139 Format: the coordinates of our data are consistent with the ITRF2005 (Altamimi et al., 2007, GJI). [XYZ files (absolute positions as the Earth-Centred Earth-Fixed (ECEF) coordinates)] 1st line Date of updating 2nd line Site name; reference coordinate system 3rd line Description of each column after 4th line Observation start date; absolute positions [XYZ coordinates]; equipment code; vessel code; Observation end date [ENU files (relative positions from the 1st epoch as local ENU coordinates)] 1st line Date of updating 2nd line Site name; reference coordinate system 3rd line Origin of the plane E-N-U coordinate system (latitude, longitude, ellipsoidal height) 4th line Position of reference epoch with (E, N, U = 0.0, 0.0, 0.0) from origin point described in 3rd line after 5th line Movements from the reference epoch [Coseismic_Tohoku files (XYZ & ENU)] 1-3rd lines Comments after 4th line Site name, observation dates and equipment codes before and after the 2011 Tohoku-oki earthquake & movements Data groups: [Before_Tohoku] Data at sites along the Japan Trench before the 2011 Tohoku-oki earthquake [Coseismic_Tohoku] Movements in the 2011 Tohoku-oki earthquake at sites along the Japan Trench [XYZ] XYZ files [ENU] ENU files ### written by Y. Yokota (Sep. 13, 2018)