Tappi 641/033 RLR(1986) is 10.7m below BM Tappi. During 1988-1990 the BM/TGZ changed slightly by 2-3mm. This was not incorporated in the RLRFAC.
Documentation added 1995-08-29
A destructive earthquake and tsunami occurred in the Kuril Islands on 4 October 1994 - see Earth System Monitor, 5(4), June 1995.
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 Peninsula of Tohoku. It was the most powerful earthquake ever to hit Japan and triggered a tsunami with waves of up to 40.5m and travelling up to 10km inland.
Japan Oceanographic Data Centre Hydrographic Department, Maritime Safety Agency MLIT Aomi Building 2-5-18, Aomi, Koto-ku Tokyo 135-0064