=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-JUN-91 :
Murotomisaki        644/061 RLR(1977) is 13.4m below Attached BM
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 22-Feb-2012 :
A massive earthquake magnitude 9.0 occurred at 14.46 JTS (05.46 UTC) on Friday 11th March 2011 with the epicentre situated approx. 70km east of the Oshika Peninsula of Tohoku. It was the largest earthquake ever to strike Japan and triggered a tsunami with waves of up to 40.5m travelling inland up to 10km.

