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.
Nearby GNSS Stations from SONEL: P212
Nearby Real Time Stations from VLIZ: naha
Fast Delivery Data from UHSLC station 355: hourly and daily
Research Quality Data from UHSLC station 355: hourly and daily
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 earthquake to hit Japan triggering a tsunami with waves of up to 40.5m high and travelling up to 10km inland.
Documentation added 2014-03-13
The GPS benchmark information has been downloaded from the SONEL website. GPS benchmark P212 is 14.130m above RLR.
Data Authority
Marine Department Japan Meteorological Agency Ote-machi, Chiyoda-ku Tokyo