Data and Station Information for ITO II

Station Information

Station ID:	1343
Latitude:	34.895556
Longitude:	139.133056
Coastline code:	642
Station code:	112
Country:	JAPAN
Time span of data:	1973 – 2024
Completeness (%):	95
Link to ellipsoid:	Available
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 ITO II.

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

Plot of annual mean sea level data at ITO II.

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.

Additional Data Sources (guide to additional data sources)

Nearby GNSS Stations from SONEL: P113

Station Documentation

Link to RLR information.

Documentation added 1991-06-11

Ito 642/112 RLR(1975) is 8.7m below BM Attach-28

Documentation added 1993-07-12

Datum shift and/or trend difference following short gap in 1978.

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 to strike Japan triggering a tsunamia with waves of up to 40.5m and travelling inland up to 10km.

Documentation added 2014-03-13

The GPS benchmark information has been downloaded from the SONEL website. GPS benchmark is P113 13.771m above RLR.

Data Authority

Geographical Survey Institute
Kitasato -1
Tsukuba-shi
Ibaraki-ken 305

Data

Data Notes

Extracted from Database

ITO II