Station Information

Station ID: 1587
Latitude: 41.2425
Longitude: 140.381389
Coastline code: 641
Station code: 33
Country: JAPAN
Time span of RLR data: 1985 – 2022
RLR completeness (%): 98
Time span of metric data: 1984 – 2022
Metric completeness (%): 98
Date of last update: 03 Feb 2023

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.

Station Documentation

Link to RLR information.

Documentation added 1991-06-11

Tappi 641/033 RLR(1986) is 10.7m below BM Tappi. During 1988-1990 the BM/TGZ changed slightly by 2-3mm. This was not incorporated in the RLRFAC.

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 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. It was the most powerful earthquake ever to hit Japan and triggered a tsunami with waves of up to 40.5m and travelling up to 10km inland.

Data Authority

Japan Oceanographic Data Centre
Hydrographic Department, Maritime Safety Agency
MLIT Aomi Building
2-5-18, Aomi, Koto-ku
Tokyo 135-0064