Uwagima II 644/022 RLR(1975) is 8.5m below Attached BM
Documentation added 2003-11-20
Datum 2001 is 2.277m below Tokyo Peil.
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 approx. 70km east of the Oshika Peninsula of Tohoku. It was the most powerful earthquake to ever hit Japan triggering a tsunami with waves of up to 40.5m high and travelling up to 10km inland. Where there is more than one benchmark with the same name a suffix has been added
Marine Department Japan Meteorological Agency Ote-machi, Chiyoda-ku Tokyo