Data



Data Notes



Extracted from Database

09 Sep 2019

OKADA

Station Information

Station ID: 1091
Latitude: 34.789444
Longitude: 139.391389
Coastline code: 642
Station code: 100
Country: JAPAN
Time span of data: 1965 – 2018
Completeness (%): 99
Date of last update: 12 Feb 2019

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.

Tide Gauge Data

Plot of monthly mean sea level data at OKADA.

Link to larger image of monthly data plot.
Download monthly mean sea level data.

Plot of annual mean sea level data at OKADA.

Link to larger image of annual data plot.
Download annual mean sea level data.

Download metric sea level data. Use only with extreme caution.
NOTE: If some of the data are red in the plots above, the 'flag for attention' is set. Please see the documentation below.

Station Documentation

Link to RLR information.

Documentation added 1991-06-11

Okada 642/100 RLR(1975) is 9.7m below Attached BM

Documentation added 2003-11-20

From Oct. 1998 datum 1998 is 1.548m 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. 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

Marine Department
Japan Meteorological Agency
Ote-machi, Chiyoda-ku
Tokyo