WCATWC: TSUNAMI BULLETIN NO. 24 | 2011 MARCH 11 – 0854 PM PST

For more information, please see latest bulletins at the West Coast & Alaska Tsunami Warning Center.WCATWC

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WEAK51 PAAQ 120454
TSUAK1

BULLETIN
PUBLIC TSUNAMI MESSAGE NUMBER 24
NWS WEST COAST/ALASKA TSUNAMI WARNING CENTER PALMER AK
854 PM PST FRI MAR 11 2011

ADVISORY CANCELED FROM CASCADE HEAD OREGON TO DOUGLAS LANE
COUNTY LINE OREGON.

...THE TSUNAMI ADVISORY CONTINUES IN EFFECT FOR THE COASTAL
   AREAS OF CALIFORNIA AND OREGON FROM ALAMITOS BAY
   CALIFORNIA/20 MILES SE OF L.A./ TO DOUGLAS-LANE COUNTY LINE
   OREGON/10 MILES SW OF FLORENCE/...

...THE TSUNAMI ADVISORY CONTINUES IN EFFECT FOR THE COASTAL
   AREAS OF ALASKA FROM CHIGNIK BAY ALASKA TO ATTU ALASKA...

...THIS MESSAGE IS INFORMATION ONLY FOR COASTAL AREAS OF
   CALIFORNIA FROM THE CALIFORNIA-MEXICO BORDER TO ALAMITOS
   BAY CALIFORNIA/20 MILES SE OF L.A./...

...THE TSUNAMI ADVISORY IS CANCELED FOR THE COASTAL AREAS
   OF OREGON FROM DOUGLAS-LANE COUNTY LINE OREGON/10 MILES SW
   OF FLORENCE/ TO CASCADE HEAD OREGON/70 MILES SW OF
   PORTLAND/...

...THIS MESSAGE IS INFORMATION ONLY FOR COASTAL AREAS OF
   OREGON - WASHINGTON - BRITISH COLUMBIA AND ALASKA FROM
   CASCADE HEAD OREGON/70 MILES SW OF PORTLAND/ TO CHIGNIK BAY
   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 946 PM PACIFIC STANDARD TIME ON MARCH 10 AN EARTHQUAKE WITH
PRELIMINARY MAGNITUDE 8.9 OCCURRED 
NEAR THE EAST COAST OF HONSHU JAPAN.
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
 ------------------------  -----  ------  -------     -----------
 POINT REYES  CA           38.0N  123.0W  1810UTC   04.5FT/01.38M
 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
 CRESCENT CITY  CA         41.7N  124.2W  1656UTC   08.2FT/02.49M
 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
 SANTA BARBARA  CA         34.4N  119.7W  2229UTC   03.2FT/00.97M
 SANTA MONICA  CA          34.0N  118.5W  2223UTC   02.8FT/00.84M

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).

 TSUNAMI AMPLITUDES CONTINUE TO DECREASE ALONG THE U.S. WEST
 COAST... BRITISH COLUMBIA AND ALASKA.  HOWEVER... SOME 
 GAGES CONTINUE TO REPORT TSUNAMI AMPLITUDES OF DANGEROUS
 LEVELS.

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
WWW.WEATHER.GOV/PTWC.

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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