Station Information

Station ID: 1344
Latitude: 37.814722
Longitude: 138.281111
Coastline code: 647
Station code: 86
Country: JAPAN
Time span of data: 1973 – 2023
Completeness (%): 97
Link to ellipsoid: Available
Date of last update: 04 Mar 2024

Green Arrow: Current Station
Yellow Marker: Neighbouring RLR Station
Red Marker: Neighbouring Metric Station

Please note: In many cases, the station position in our database is accurate to only one minute. Thus, the tide gauge may not appear to be on the coast.

Additional Data Sources (guide to additional data sources)

Nearby GNSS Stations from SONEL: P109

Station Documentation

Link to RLR information.

Documentation added 1991-06-11

Ogi 647/086 RLR(1975) is 9.3m below BM Attach-29

Documentation added 1996-11-15

January 1995 - new station

Documentation added 2012-02-22

A massive earthquake magnitude 9.0 occurred at 14.46 JST (05.46 UTC) on Friday 11th March 2011 with the epicentre situated approx. 70km east of the Oshika Peninsula of Tohoku. The earthquake was the largest ever ti strike Japan and triggered a tsunami with waves of up to 40.5m and travelling inland up to 10km.

The datum was lowered in 1986 by 3mm. On the original diagram this was not applied to the RLR factor.

Documentation added 2014-03-13

The GPS benchmark information has been downloaded from the SONEL website. GPS benchmark P109 is 13.618m above RLR.

Data Authority

Geographical Survey Institute
Kitasato -1
Ibaraki-ken 305