Please note: In many cases, the station position in our database is accurate
to only one minute. Thus, the tide gauge may not appear to be on the coast.
Nearby GNSS Stations from SONEL: ASPA
Fast Delivery Data from UHSLC station 56: hourly and daily
Research Quality Data from UHSLC station 56: hourly and daily
Although not obvious from the data there was a tsunami in the area 29-30 September 2009.
Documentation added 2011-11-23
Using information from the NOAA website the RLR diagram has been revised. Previous Primary benchmark NO 1 1948 no longer appears in the NOAA reports. Primary benchmark is now 0000 S 1993 AS 29 ASPA 2002 2.557m above gauge datum.
Documentation added 2013-02-28
Data for 2011 and 2012 almost look like a datum change but the profile must be real as that is how it appears on the NOAA website. It also buddy checks well with Apia B id. 1840