Okinawa 646/021 RLR(1976) is 13.3m below BM Attach-30
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 Penenisula of Tohoku. It was the most powerful earthquake ever 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 P124 is 14.485m above RLR.
Geographical Survey Institute Kitasato -1 Tsukuba-shi Ibaraki-ken 305