National Tsunami Warning Center, NOAA/NWS

Southern Sumatra, Indonesia Tsunami of 30 September, 2009

An earthquake with a moment magnitude of 7.6 (USGS Magnitude) occurred at 1016 UTC, 30 September 2009 (day 273) and was located 60 km (35 miles) WNW of Padang, Sumatra, Indonesia (0.725 S, 99.856 E, 81 km depth - USGS location).

This earthquake produced a tsunami that was recorded at tide gages monitored at the Tsunami Warning Centers. Many observatories provide data to the centers; such as the NOAA National Ocean Service, 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 West Coast/Alaska Tsunami Warning Center (NTWC) based on the origin time and location. The Sample Interval column shows the time between samples.

For additional information about this tsunami event see the Pacific Tsunami Warning Center's homepage .

Travel Time Map
(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)

Padang, Indonesia







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