The tsunami warning for California and Oregon have been downgraded to an advisory. The Tsunami Advisory continues in effect for the coastal areas of California from the California-Mexico border to Point Concepcion, California.
The Tsunami Advisory is expanded to include the coastal areas of California and Oregon from Point Concepcion, California to the Oregon-Washington border.
The Tsunami Advisory continues in effect for the coastal areas of Washington, British Columbia and Alaska from the Oregon-Washington 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 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 9:46 PM Pacific Standard Time on March 10, an earthquake with preliminary magnitude 8.9 occurred near the east coast of Honshu, Japan . (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.
Measurements or reports of tsunami activity:
Location Lat. Lon. Time Amplitude
Port Orford OR 42.7N 124.5W 1724UTC 06.1FT/01.85M
Adak AK 51.9N 176.6W 1755UTC 03.6FT/01.09M
Kodiak AK 57.7N 152.5W 2211UTC 00.9FT/00.28M
Los Angeles CA 33.7N 118.3W 2115UTC 01.7FT/00.51M
San Diego CA 32.7N 117.2W 2131UTC 01.7FT/00.51M
La Jolla CA 32.9N 117.3W 2007UTC 01.4FT/00.43M
Westport WA 46.9N 124.1W 1920UTC 02.0FT/00.62M
St Paul Is. AK 57.1N 170.3W 1228UTC 02.1FT/00.65M
Old Harbor AK 57.2N 153.3W 2154UTC 01.1FT/00.33M
Dutch Harbor AK 53.9N 166.5W 1204UTC 01.3FT/00.41M
Shemya AK 52.7N 174.1E 1136UTC 05.2FT/01.58M
Arena Cove CA 38.9N 123.7W 1834UTC 08.7FT/02.65M
Santa Monica CA 34.0N 118.5W 2223UTC 02.8FT/00.84M
San Francisco CA 37.8N 122.5W 1749UTC 02.1FT/00.64M
Monterey Harbor CA 36.6N 121.9W 2013UTC 02.4FT/00.72M
North Spit CA 40.8N 124.2W 1639UTC 03.3FT/01.01M
Port San Luis CA 35.2N 120.8W 1745UTC 08.6FT/02.64M
Santa Barbara CA 34.4N 119.7W 2229UTC 03.2FT/00.97M
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.
Pacific coastal regions outside California, Oregon, Washington, British Columbia, and Alaska should refer to the Pacific Tsunami Warning Center messages for information on the event.
This message will be updated in 60 minutes or sooner if the situation warrants. The tsunami message will remain in effect until further notice.