000
WEAK51 PAAQ 280448
TSUAK1

BULLETIN
PUBLIC TSUNAMI MESSAGE NUMBER 4
NWS WEST COAST/ALASKA TSUNAMI WARNING CENTER PALMER AK
948 PM PDT SAT OCT 27 2012

THE TSUNAMI HAS BEEN RECORDED WITH SMALL AMPLITUDES IN SE ALASKA.
FORECASTS INDICATE HEIGHTS IN S CENTRAL ALASKA BELOW 30CM.
THE WARNING AREA REMAINS THE SAME.

...THE TSUNAMI WARNING CONTINUES IN EFFECT FOR THE COASTAL
   AREAS OF BRITISH COLUMBIA AND ALASKA FROM THE NORTH TIP OF
   VANCOUVER ISLAND BRITISH COLUMBIA TO CAPE DECISION
   ALASKA/LOCATED 85 MILES SE OF SITKA/...

...THIS MESSAGE IS INFORMATION ONLY FOR COASTAL AREAS OF
   CALIFORNIA - OREGON - WASHINGTON AND BRITISH COLUMBIA FROM
   THE CALIFORNIA-MEXICO BORDER TO THE NORTH TIP OF VANCOUVER
   ISLAND BRITISH COLUMBIA...

...THIS MESSAGE IS INFORMATION ONLY FOR COASTAL AREAS OF
   ALASKA FROM CAPE DECISION ALASKA/LOCATED 85 MILES SE OF
   SITKA/ TO ATTU ALASKA...

A TSUNAMI WARNING MEANS... ALL COASTAL RESIDENTS IN THE WARNING
AREA 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.

AT 804 PM PACIFIC DAYLIGHT TIME ON OCTOBER 27 AN EARTHQUAKE WITH
PRELIMINARY MAGNITUDE 7.7 OCCURRED 25 MILES/40 KM SOUTH OF
SANDSPIT BRITISH COLUMBIA.
THIS EARTHQUAKE HAS GENERATED A TSUNAMI WHICH COULD CAUSE DAMAGE
TO REGIONS IN A WARNING OR ADVISORY.
THE WAVES WILL FIRST REACH
LANGARA ISLAND BRITISH COLUMBIA AT 916 PM PDT ON OCTOBER 27.
ESTIMATED TSUNAMI ARRIVAL TIMES AND MAPS ALONG WITH SAFETY RULES
AND OTHER INFORMATION CAN BE FOUND ON THE WEB SITE
WCATWC.ARH.NOAA.GOV.

MEASUREMENTS OR REPORTS OF TSUNAMI ACTIVITY

 LOCATION                   LAT    LON     TIME        AMPL
 ------------------------  -----  ------  -------     -----------
 DART46419PT NW SEATTLE    48.8N  129.6W  0345UTC   00.2FT/00.07M
 CRAIG  AK                 55.5N  133.1W  0425UTC   00.3FT/00.09M
 PORT ALEXANDER  AK        56.2N  134.6W  0410UTC   00.3FT/00.08M

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.

PACIFIC COASTAL REGIONS OUTSIDE CALIFORNIA/ OREGON/ WASHINGTON/
BRITISH COLUMBIA AND ALASKA SHOULD REFER TO THE PACIFIC TSUNAMI
WARNING CENTER MESSAGES FOR INFORMATION ON THIS EVENT AT
PTWC.WEATHER.GOV.

THIS MESSAGE WILL BE UPDATED IN 30 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.

$$