U.S. West Coast, Alaska, and British Columbia coastal regions
NOAA/NWS/West Coast and Alaska
Tsunami Warning Center
Tsunami Warning and Advisory
#15 issued 03/11/2011 at 11:45AM PST
The advisory and warning regions have not changed. Tsunami
observations are updated below.
The Tsunami Warning
continues in effect for 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 California from the California-Mexico border to Point Concepcion, California.
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 Warning means that all coastal residents in the
who are near the beach or in low-lying regions should move
immediately inland to higher ground and away from all harbors and
inlets including those sheltered directly from the sea. Those
feeling the earth shake, seeing unusual wave action, or the
water level rising or receding may have only a few minutes before
the tsunami arrival and should move immediately. Homes and
small buildings are not designed to withstand tsunami impacts.
Do not stay in these structures.
All residents within the warned area should be alert for
instructions broadcast from their local civil authorities.
A tsunami has been recorded.
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
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
along with safety rules
and other information
can be found on the WCATWC
Measurements or reports of tsunami activity:
Location Lat. Lon. Time Amplitude
Time - Time of measurement.
------------------------ ----- ------ ------- -----------
North Spit CA 40.8N 124.2W 1630UTC 03.1FT/00.95M
Port San Luis CA 35.2N 120.8W 1721UTC 06.3FT/01.93M
Port Angeles WA 48.1N 123.4W 1827UTC 01.9FT/00.59M
Winter Harbour BC 50.7N 128.3W 1450UTC 01.7FT/00.53M
Santa Monica CA 34.0N 118.5W 1845UTC 02.4FT/00.74M
Santa Barbara CA 34.4N 119.7W 1801UTC 02.2FT/00.67M
Sand Point AK 55.3N 160.5W 1812UTC 01.6FT/00.49M
Nikolski AK 52.9N 168.9W 1614UTC 02.7FT/00.82M
King Cove AK 55.1N 162.3W 1713UTC 01.6FT/00.48M
Craig AK 55.5N 133.1W 1613UTC 00.8FT/00.24M
Elfin Cove AK 58.2N 136.3W 1535UTC 00.5FT/00.16M
Sitka AK 57.1N 135.3W 1711UTC 01.0FT/00.32M
Point Reyes CA 38.0N 123.0W 1803UTC 04.4FT/01.35M
Port Orford OR 42.7N 124.5W 1724UTC 06.1FT/01.85M
Adak AK 51.9N 176.6W 1747UTC 03.4FT/01.05M
Kodiak AK 57.7N 152.5W 1550UTC 00.5FT/00.15M
Los Angeles CA 33.7N 118.3W 1905UTC 01.1FT/00.32M
San Diego CA 32.7N 117.2W 1906UTC 00.7FT/00.21M
La Jolla CA 32.9N 117.3W 1834UTC 01.0FT/00.31M
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).
THE TSUNAMI IMPACT CONTINUES ALONG THE WEST COAST. TSUNAMI
AMPLITUDE IS STILL RISING AT SOME LOCATIONS AND IS EXPECTED TO
PERSIST FOR SEVERAL MORE HOURS.
PLEASE STAY TUNED TO INSTRUCTION FROM YOU LOCAL EMERGENCY
OFFICIALS BEFORE RETURNING TO ENDANGERED AREAS.
FURTHER WAVE OBSERVATIONS ARE POSTED ON THE WCATWC WEB SITE
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
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. 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