Station Information

Station ID: 1093
Latitude: 38.467778
Longitude: 139.255
Coastline code: 647
Station code: 90
Country: JAPAN
Time span of data: 1965 – 2022
Completeness (%): 95
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

Awa Sima 647/090 RLR(1971) is 9.1m below BM Awa Sima

Documentation added 1993-07-12

During the 1980s and 1990s the value for the benchmark above TGZ varies from 3.126m to a max of 3.129m. Throughout the RLRFAC remained the same

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 earthquake known to hit Japan triggering a tsunami with waves up to 40.5m and travelling up to 10 km inland.

Data Authority

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