Station Information

Station ID: 722
Latitude: 35.288056
Longitude: 139.651389
Coastline code: 642
Station code: 81
Country: JAPAN
Time span of data: 1954 – 2019
Completeness (%): 94
Date of last update: 12 Aug 2020

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

Yokosuka 642/081 RLR(1975) is 9.9m below BM Yokosuka

Documentation added 2012-02-21

A massive earthquake magnitude 9.0 occurred at 14.46 JST (05.46 UTC) on Friday11th March 2011 with the epicentre approx. 70km east of the Oshika Peninsula of Tohoku. It was the most powerful known earthquake to hit Japan and triggered a tsunami with waves up to 40.5m 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