National Tsunami Warning Center, NOAA/NWS

Talaud Islands Tsunami of 11 February 2009

A major earthquake with a moment magnitude of 7.2 (USGS magnitude) occurred at 17:34:50 UTC 11 February 2009 (day 042) and was located 174 miles/278 km SSE of General Santos, Mindanao, Philippines (3.9N, 126.4E, 12.4mi/19.8km depth--USGS location).

This earthquake produced a small tsunami that was recorded at the tide gage at Davao, Philippine Islands. Many observatories provide data to the Tsunami Warning Centers; such as the NOAA National Ocean Service, the Japanese Meteorological Agency, the U. of Hawaii Sea Level Center, the Chilean Navy, and the National Tidal Facility in Australia among others. Click on the site name to see a graph of the tsunami, when available. Listed wave heights are maximum amplitude in cm (above sea level). Observed Arrival time is the actual tsunami arrival time in UTC on gages where it could be determined. The Computed Arrival time is the estimated time of arrival computed at the National Tsunami Warning Center (NTWC) based on the origin time and location. The Sample Interval column shows the time between samples.


maximum amplitude graph

Maximum Amplitude Graph
(click to enlarge)


Tide gage

Peak amplitude (above sea level in cm)

Observed Initial Arrival time (UTC)

Computed Initial Arrival time (UTC)

Initial motion

Sample Interval (min)

Data File (Julian Day Starts at  0000 UTC)

Davao, Philippines

12.5 (detided)


1821 (?)

up (?)



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