National Tsunami Warning Center, NOAA/NWS

Libertador O Higgins, Chile Tsunami of 11 March 2010

A strong earthquake with a moment magnitude of 6.9 (USGS magnitude) occurred at 11:39:44 UTC 11 March 2010 (day 070) and was located 85 miles/140 km SSW of Valparaiso, Chile (34.259S, 71.929W, 6.8mi/11.0km 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 National Tsunami Warning Center (NTWC) based on the origin time and location. The Sample Interval column shows the time between samples.

For additional information about these tsunami events see the Pacific Tsunami Warning Center's homepage .


Travel Time Map
(click to enlarge)

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)

Valparaiso, Chile 8 ? 1516 ? 2 70 71
San Antonio, Chile 14 ?   ? 2 70 71

* Contributed by Pacific Tsunami Warning Center

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