=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991 Nikiski 821/013 RLR(1973) is 14.4m below BM#5 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 02-Apr-1992 SOUTH ALASKAN COASTLINE EARTHQUAKE PRONE - E.G. MAGNITUDE 9.2 EARTHQUAKE OF 28 MARCH 1964 - SEE SAVAGE AND PLAFKER, JGR, 96(B3), 4325-4335, 1991 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 28-Jan-2009 Treat early data as suspect. =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 20-Dec-2011 Using NOAA data the RLR diagram has been revised.Previous Primary benchmark BM #5 13.228m above gauge datum no longer features in the NOAA reports. Current Primary benchmark is 5760 L 1983 14.85m above gauge datum.