Canada tsunami bulletin 7

WEAK51 PAAQ 280617
TSUAK1

BULLETIN
PUBLIC TSUNAMI MESSAGE NUMBER 7
NWS WEST COAST/ALASKA TSUNAMI WARNING CENTER PALMER AK
1117 PM PDT SAT OCT 27 2012

THE WARNING IS DOWNGRADED TO AN ADVISORY FOR SE ALASKA AND
NORTHERN BRITISH COLUMBIA.  MORE OBSERVATIONS ARE INCLUDED
BELOW.

...THE TSUNAMI ADVISORY CONTINUES IN EFFECT FOR THE COASTAL
   AREAS OF CALIFORNIA AND OREGON FROM GUALALA POINT
   CALIFORNIA/LOCATED 80 MILES NW OF SAN FRANCISCO/ TO
   DOUGLAS-LANE COUNTY LINE OREGON/10 MILES SW OF FLORENCE/...

...THE TSUNAMI ADVISORY CONTINUES IN EFFECT FOR THE COASTAL
   AREAS OF BRITISH COLUMBIA FROM THE WASHINGTON-BRITISH
   COLUMBIA BORDER TO THE NORTH TIP OF VANCOUVER ISLAND
   BRITISH COLUMBIA...

...THE TSUNAMI ADVISORY IS MODIFIED TO INCLUDE 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 FROM THE CALIFORNIA-MEXICO BORDER TO GUALALA
   POINT CALIFORNIA/LOCATED 80 MILES NW OF SAN FRANCISCO/...

...THIS MESSAGE IS INFORMATION ONLY FOR COASTAL AREAS OF
   OREGON AND WASHINGTON FROM DOUGLAS-LANE COUNTY LINE
   OREGON/10 MILES SW OF FLORENCE/ TO THE WASHINGTON-BRITISH
   COLUMBIA BORDER...

...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 ADVISORY MEANS THAT A TSUNAMI CAPABLE OF PRODUCING
STRONG CURRENTS OR WAVES DANGEROUS TO PEOPLE 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 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.
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  0427UTC   00.4FT/00.11M
 PORT ALEXANDER  AK        56.2N  134.6W  0533UTC   00.4FT/00.14M
 WINTER HARBOUR  BC        50.7N  128.3W  0400UTC   00.5FT/00.16M
 SITKA  AK                 57.1N  135.3W  0425UTC   00.3FT/00.09M
 ELFIN COVE  AK            58.2N  136.3W  0448UTC   00.2FT/00.07M
 SITKA  AK                 57.1N  135.3W  0525UTC   00.3FT/00.09M
 YAKUTAT  AK               59.5N  139.7W  0523UTC   00.4FT/00.12M
 CHARLESTON  OR            43.3N  124.3W  0524UTC   00.3FT/00.09M
 GARIBALDI  OR             45.6N  123.9W  0515UTC   00.2FT/00.05M
 LA PUSH  WA               47.5N  124.4W  0448UTC   00.4FT/00.13M
 NEAH BAY  WA              48.4N  124.6W  0530UTC   00.3FT/00.10M
 PORT ORFORD  OR           42.7N  124.5W  0519UTC   00.5FT/00.14M
 SOUTH BEACH  OR           44.6N  124.0W  0524UTC   00.3FT/00.09M
 WESTPORT  WA              46.9N  124.1W  0514UTC   00.3FT/00.09M
 YAKUTAT  AK               59.5N  139.7W  0520UTC   00.3FT/00.08M
 ARENA COVE  CA            38.9N  123.7W  0558UTC   00.5FT/00.17M
 CRESCENT CITY  CA         41.7N  124.2W  0555UTC   00.6FT/00.19M

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.

$$