TSUAK1
BULLETIN
PUBLIC TSUNAMI MESSAGE NUMBER 20
NWS WEST COAST/ALASKA TSUNAMI WARNING CENTER PALMER AK
557 PM PST SAT FEB 27 2010
...A TSUNAMI ADVISORY IS IN EFFECT WHICH INCLUDES THE
COASTAL AREAS OF CALIFORNIA FROM THE CALIFORNIA-MEXICO
BORDER TO THE OREGON-CALIFORNIA BORDER...
...A TSUNAMI ADVISORY IS IN EFFECT WHICH INCLUDES THE
COASTAL AREAS OF ALASKA FROM SITKA ALASKA TO ATTU ALASKA...
...THIS MESSAGE IS INFORMATION ONLY FOR COASTAL AREAS OF
OREGON AND WASHINGTON FROM THE OREGON-CALIFORNIA BORDER TO
THE WASHINGTON-BRITISH COLUMBIA BORDER...
...THE TSUNAMI ADVISORY IS CANCELED FOR THE COASTAL AREAS
OF BRITISH COLUMBIA AND ALASKA FROM THE WASHINGTON-BRITISH
COLUMBIA BORDER TO SITKA 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 1034 PM PACIFIC STANDARD TIME ON FEBRUARY 26 AN EARTHQUAKE WITH
PRELIMINARY MAGNITUDE 8.8 OCCURRED
NEAR THE COAST OF CENTRAL CHILE.
THIS EARTHQUAKE HAS GENERATED A TSUNAMI WHICH COULD CAUSE DAMAGE
TO REGIONS IN A WARNING OR ADVISORY.
ESTIMATED TSUNAMI ARRIVAL TIMES AND MAPS ALONG WITH SAFETY RULES
AND OTHER INFORMATION CAN BE FOUND ON THE WEB SITE
WCATWC.ARH.NOAA.GOV.
A TSUNAMI HAS BEEN OBSERVED AT THE FOLLOWING SITES
LOCATION LAT LON TIME AMPL
------------------------ ----- ------ ------- -----------
OLD HARBOR AK 57.2N 153.3W 0121UTC 0.46M/1.5FT
SAND POINT AK 55.3N 160.5W 0130UTC 0.32M/1.1FT
CRESCENT CITY CA 41.7N 124.2W 0006UTC 0.60M/2.0FT
SITKA AK 57.1N 135.3W 0027UTC 0.14M/0.5FT
WINTER HARBOUR BC 50.7N 128.3W 2313UTC 0.24M/0.8FT
CHARLESTON OR 43.3N 124.3W 2206UTC 0.12M/0.4FT
SANTA MONICA CA 34.0N 118.5W 2022UTC 0.71M/2.3FT
PORT ORFORD OR 42.7N 124.5W 2140UTC 0.27M/0.9FT
SAN DIEGO CA 32.7N 117.2W 2052UTC 0.33M/1.1FT
SANTA BARBARA CA 34.4N 119.7W 2252UTC 0.72M/2.3FT
TSUNAMI AMPLITUDES ALONG SOUTHEAST ALASKA AND BRITISH COLUMBIA
COASTS HAVE ARE BELOW DANGER LEVELS. AMPLITUDES OBSERVED ALONG THE
CALIFORNIA COAST ARE STILL ABOVE DANGER LEVELS AT A FEW LOCATIONS.
TSUNAMI AMPLITUDES ARE ARRIVING AND INCREASING ALONG THE SOUTHERN
ALASKA AND ALASKA PENINSULA COASTS.
TIME - TIME OF MEASUREMENT
AMPL - 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
CALIFORNIA/ OREGON/ WASHINGTON/ BRITISH COLUMBIA AND ALASKA.
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 WEB SITE WCATWC.ARH.NOAA.GOV.
$$
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