This page shows time series data observed using GNSS-A seasfloor geodetic observation. These are raw data.
Please refer this data paper [Scientific Data].
| Site | Site | Site |  |
|||
| (1) | KAMN | (9) | TOK1 | (17) | MRT2 | |
| (2) | KAMS | (10) | TOK2 | (18) | MRT3 | |
| (3) | MYGI | (11) | TOK3 | (19) | TOS1 | |
| (4) | MYGW | (12) | KUM1 | (20) | TOS2 | |
| (5) | FUKU | (13) | KUM2 | (21) | ASZ1 | |
| (6) | CHOS | (14) | KUM3 | (22) | ASZ2 | |
| (7) | BOSN | (15) | SIOW | (23) | HYG1 | |
| (8) | SAGA | (16) | MRT1 | (24) | HYG2 |
| Latest data | updated on Jan. 10, 2020 |
| (1)-(6) before Tohoku Earthquake | updated on Mar. 31, 2017 |
| coseismic movements at (1)-(6) | updated on Mar. 31, 2017 |
Record of Updates
| updated on Jan 10, 2020 |
| updated on Nov 07, 2019 |
| updated on Sep 05, 2019 |
| updated on May 09, 2019 |
| updated on Oct 31, 2018 |
| updated on Sep 04, 2018 |
| updated on Jul 18, 2018 |
| updated on Jan 17, 2018 |
Format of xyz-data
We converted the coordinate value with GEONET F3 (ITRF2005) into the Earth Centered Earth Fixed coordinate system (X, Y, Z). Data format is written as below.
| Line 1 | date of updating |
| Line 2 | site name; reference coordinate system |
| Line 3 | description of each column |
| Line 4- | observation start date; absolute positions [XYZ coordinates (m)]; equipment code (A:-2002/07, B:-2008/04, C:2008/04-); vessel code (K:Kaiyo, M:Meiyo, S:Shoyo, T:Takuyo); observation end date |
Format of enu-data
We converted the coordinate value with GEONET F3 (ITRF2005) into a plane X-Y-Z coordinate system (Eastward, Northward, Upward). Data format is written as below.
| Line 1 | date of updating |
| Line 2 | site name; reference coordinate system |
| Line 3 | origin of the plane E-N-U coordinate system (latitude, longitude, ellipsoidal height) |
| Line 4 | position of reference epoch with (E, N, U = 0.0, 0.0, 0.0) from origin point described in Line 3 |
| Line 5- | observation start date; absolute positions [ENU coordinates (m)]; equipment code; vessel code; observation end date |
Format of coseismic movements due to the Tohoku Earthquake
Movements in xyz-data & enu-data are calculated based on the above formats.
| Lines 1-3 | headers |
| Line 4 | sites; observation date before Mar. 11, 2011; vessel code; observation date after Mar. 11, 2011; vessel code; movements [m] |
Attention
Horizontal components were influenced from undersea disturbances. The precision is 2 - 3 cm (1σ).
The precision of a vertical component was worse 2 -3 times than horizontal ones.
GEONET 1-sec data and F3 solutions (provided from GSI) were used in the analysis.
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