Data and Station Information for KOMATSUSHIMA

Station Information

Station ID:	809
Latitude:	34.009167
Longitude:	134.587778
Coastline code:	644
Station code:	51
Country:	JAPAN
Time span of RLR data:	1958 – 2024
RLR completeness (%):	99
Time span of metric data:	1957 – 2024
Metric completeness (%):	98
Date of last update:	21 Mar 2025

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 KOMATSUSHIMA.

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

Plot of annual mean sea level data at KOMATSUSHIMA.

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

Komatsushima 644/051 RLR(1976) is 8.6m below Attached BM. Attached BM (i) superceded the previous benchmark in 1994

Documentation added 2011-02-23

Buddy checked with Wakayama data profiles compare well.

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 triggering a tsunami with wave up to 40.5m and travelling up to 10km inland.

Data Authority

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

Data

Data Notes

Extracted from Database

KOMATSUSHIMA