To: U.S. West Coast, Alaska, and British Columbia coastal regions
From: NOAA/NWS/West Coast and Alaska Tsunami Warning Center
Subject: Tsunami Advisory #15 issued 02/27/2010 at 1:05PM PST

A Tsunami Advisory is in effect which includes the coastal areas of California, Oregon, Washington, British Columbia and Alaska from the California-Mexico border to Attu, Alaska.

A Tsunami Advisory means that a tsunami capable of producing strong currents or waves dangerous to persons in or very near the water is imminent or expected. Significant, widespread inundation is not expected for areas under an advisory. Currents may be hazardous to swimmers, boats, and coastal structures and may continue for several hours after the initial wave arrival.

At 10:34 PM Pacific Standard Time on February 26, an earthquake with preliminary magnitude 8.8 occurred near the coast of central Chile . (Refer to the United States Geological Survey for official earthquake parameters.) This earthquake has generated a tsunami which could cause damage to coastal regions in a warning or advisory. Estimated tsunami arrival times and maps along with safety rules and other information can be found on the WCATWC web site.

A tsunami has been observed at the following sites:

 Location                   Lat.   Lon.    Time        Amplitude
------------------------ ----- ------ ------- -----------
Santa Monica CA 34.0N 118.5W 2024UTC 0.64M/2.1ft Rikitea Fr. Polynesia 23.1S 135.0W 1737UTC 0.28M/0.9ft San Felix Chile 26.3S 80.1W 0841UTC 0.59M/2.0ft Santa Cruz Galapagos E 0.5S 90.2W 1240UTC 1.08M/3.5ft Waitangi Chatham Islan 43.9S 176.6W 1932UTC 0.55M/1.8ft Raoul Is. Fishing Dock 29.3S 177.9W 1937UTC 0.26M/0.9ft Pago Pago Amer. Samoa 14.3S 170.7W 2030UTC 0.43M/1.4ft Owenga Chatham NZ 44.0S 176.4W 2003UTC 0.75M/2.5ft Baltra Ecuador 0.4S 90.3W 1430UTC 0.45M/1.5ft Quepo Costa Rica 9.4N 84.2W 1417UTC 0.27M/0.9ft Tsunami Forecasts at selected points - more on web site La Jolla, CA 0.8M/2.6 FT Los Angeles, CA 0.8M/2.6 FT Malibu, CA 1.0M/3.3 FT Pismo Beach, CA 1.4M/4.6 FT Half Moon Bay, CA 1.0M/3.3 FT San Diego, CA 0.4M/1.3 FT Humboldt Bay, CA 0.4M/1.3FT Crescent City, CA 0.6M/2.0 FT Santa Monica, CA 1.2M/3.9 FT Moclips, WA 0.4M/1.3 FT Santa Barbara, CA 0.8M/2.6 FT Laguna Beach, CA 0.9M/2.9 FT Seward, AK 0.4M/1.3 FT Kodiak, AK 0.7M/2.3 FT Forecasts indicate the expected height above normal sea level. Tsunamis are expected to peak two to four hours after arrival.
Time - Time of measurement.
Amp. - Tsunami amplitudes are measured relative to normal sea level. It is NOT crest-to-trough wave height. Values are given in both meters (M) and feet (FT).

Tsunamis can be dangerous waves that are not survivable. Wave heights are amplified by irregular shoreline and are difficult to forecast. Tsunamis often appear as a strong surge and may be preceded by a receding water level. Mariners in water deeper than 600 feet should not be affected by a tsunami. Wave heights will increase rapidly as water shallows. Tsunamis are a series of ocean waves which can be dangerous for several hours after the initial wave arrival. DO NOT return to evacuated areas until an all clear is given by local civil authorities.

The Pacific Tsunami Warning Center in Ewa Beach, Hawaii will issue messages for Hawaii and other areas of the Pacific outside the states and provinces listed above.

This message will be updated in 60 minutes or sooner if the situation warrants. The tsunami message will remain in effect until further notice. For further information stay tuned to NOAA Weather Radio, your local TV or radio stations, or see the WCATWC web site.

Link to Standard Warning Message
Link to Public Warning Message
Link to XML/CAP Message
Link to Printable Message