Station Information

Station ID: 813
Latitude: 41.781667
Longitude: 140.724722
Coastline code: 641
Station code: 31
Country: JAPAN
Time span of RLR data: 1961 – 2023
RLR completeness (%): 99
Time span of metric data: 1957 – 2023
Metric completeness (%): 99
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: P204
Nearby Real Time Stations from VLIZ: hako
Fast Delivery Data from UHSLC station 364: hourly and daily
Research Quality Data from UHSLC station 364: hourly and daily

Station Documentation

Link to RLR information.

Documentation added 1991-06-11

Hakodate I 641/031 RLR(1972) is 9.0m below Attached BM

Documentation added 1995-08-29

A destructive earthquake and tsunami occurred in the Kuril Islands on 4 October 1994 - see Earth System Monitor, 5(4), June 1995.

Documentation added 2003-11-20

Datum 1998 is 1.434m below Tokyo Peil.

Documentation added 2012-02-21

A massive earthquake magnitude 9.0 occurred at 14.46 JST (05.46 UTC) on Friday 11th March 2011 with the epicentre approx. 70 km east of the Oshika Peninsula of Tohoku. It was the most powerful known earthquake to hit Japan triggering a tsunami with waves up to 40.5m and travelling up to 10km inland.

Documentation added 2014-03-13

The GPS benchmark information has been downloaded from SONEL website. GPS benchmark P204 is 12.141m above RLR.

Data Authority

Japan Meteorological Agency
3-6-9 Toranomon, Minato City