=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991 Kainan 643/013 RLR(1974) is 10.2m below BM Attach-14 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 17-Nov-2009 The relevant authority for this station is the Geographical Survey Institute. For some reason the data for 1998 was not downloaded from this authority. Data downloaded and entered 17.11.09. =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 22-Feb-2011 Sea Level profile for Kainan compares very well when buddy checked with that for Wakayama. =========================== 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 epicenter approx. 70km east of the Oshika Peninsula of Tohoku. It was the most powerful known earthquake to hit Japan and triggered a tsunami with waves of up to 40.5m and travelling 10km inland. =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 13-Mar-2014 The GPS benchmark information has been downloaded from the SONEL website. GPS benchmark is P117 14.502m above RLR.