=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Misumi              645/051 RLR(1975) is 10.8m below Attached BM
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 23-Feb-2011
Buddy checked with Kuchinotsu - data profiles compare extremely well.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 21-Feb-2012
A massive earthquake magnitude 9.0 occurred at 14.46 JST (05.46 UTC) on Friday 11th March 2011 with epicentre 70km east of the Oshika Peninsula of Tohoku. It was the most powerful known earthquake to hit Japan triggering a tsunami with waves up to 40.5m and travelling up to 10km inland.