=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Kozu Simu           642/099 RLR(1970) is 12.1m below BM Kozu Simu
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 28-Nov-2006
sttn flagged - dataset suspect.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 06-Mar-2008
Data for 2007 flagged suspect.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 05-May-2009
There is what appears to be a datum shift 2007 onwards relevant data flagged.
=========================== 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 the epicentre approx. 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.