Tsunami #3

Deux jours après un exercice tsunami (à Tahiti seulement) , voici donc une véritable alerte suite au séisme du Japon: magnitude 8.9

Donc 10^(1,5 x 0,1) = 1,4 fois plus puissant (40%) que celui du Chili l'année dernière.

Internet et la TV satellite (CNN, LCI,..) font qu'aujourd'hui, on voit en quasi direct les vagues monstrueuses qui avancent dans les plaines et villes japonaises, en détruisant tout sur leurs passages, voitures, maisons, immeubles, et surtout des vies humaines.

Une pensée pour les pauvres gens concernés.



Voici la carte de déplacement des vagues

et le site de Hawaii spécialisé sur les alertes tsunami dans le Pacifique:

http://ptwc.weather.gov/

Ainsi que leur dernier bulletin TEXT:

WEPA40 PHEB 111638
TSUPAC
TSUNAMI BULLETIN NUMBER 012
PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED AT 1638Z 11 MAR 2011
THIS BULLETIN APPLIES TO AREAS WITHIN AND BORDERING THE PACIFIC
OCEAN AND ADJACENT SEAS...EXCEPT ALASKA...BRITISH COLUMBIA...
WASHINGTON...OREGON AND CALIFORNIA.
... A WIDESPREAD TSUNAMI WARNING IS IN EFFECT ...
A TSUNAMI WARNING IS IN EFFECT FOR
JAPAN / TAIWAN / PHILIPPINES / BELAU /
POHNPEI / CHUUK / KOSRAE / INDONESIA / PAPUA NEW GUINEA /
NAURU / SOLOMON IS. / KIRIBATI / HOWLAND-BAKER /
HAWAII / TUVALU / PALMYRA IS. / VANUATU / TOKELAU / JARVIS IS. /
WALLIS-FUTUNA / SAMOA / AMERICAN SAMOA / COOK ISLANDS / NIUE /
FIJI / NEW CALEDONIA / TONGA / MEXICO /
KERMADEC IS / FR. POLYNESIA / PITCAIRN /
GUATEMALA / EL SALVADOR / COSTA RICA / NICARAGUA / ANTARCTICA /
PANAMA / HONDURAS / CHILE / ECUADOR / COLOMBIA / PERU
THIS BULLETIN IS ISSUED AS ADVICE TO GOVERNMENT AGENCIES.  ONLY
NATIONAL AND LOCAL GOVERNMENT AGENCIES HAVE THE AUTHORITY TO MAKE
DECISIONS REGARDING THE OFFICIAL STATE OF ALERT IN THEIR AREA AND
ANY ACTIONS TO BE TAKEN IN RESPONSE.
AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS
ORIGIN TIME -  0546Z 11 MAR 2011
COORDINATES -  38.3 NORTH  142.4 EAST
DEPTH       -   24 KM
LOCATION    -  NEAR EAST COAST OF HONSHU  JAPAN
MAGNITUDE   -  8.9
MEASUREMENTS OR REPORTS OF TSUNAMI WAVE ACTIVITY
GAUGE LOCATION        LAT   LON    TIME        AMPL         PER
VANUATU              17.8S 168.3E  1542Z   0.69M /  2.3FT  22MIN
LUGANVILLE VU        15.5S 167.2E  1537Z   0.54M /  1.8FT  54MIN
LAUTOKA FJ           17.6S 177.4E  1545Z   0.33M /  1.1FT  76MIN
WINTER HARBOUR BC    50.7N 128.3W  1504Z   0.51M /  1.7FT  30MIN
CHARLESTON OR        43.3N 124.3W  1545Z   0.49M /  1.6FT  24MIN
NORTH SPIT HUMBOLDT  40.8N 124.2W  1553Z   0.54M /  1.8FT  26MIN
KAUMALAPAU HAWAII    20.8N 156.9W  1531Z   0.91M /  3.0FT  06MIN
LOMBRUM MANUS IS PG   2.0S 147.4E  1529Z   1.04M /  3.4FT  62MIN
PAGO PAGO AS         14.3S 170.7W  1556Z   0.34M /  1.1FT  16MIN
ARENA COVE CA        38.9N 123.7W  1540Z   0.82M /  2.7FT  22MIN
CRESCENT CITY CA     41.7N 124.2W  1536Z   1.12M /  3.7FT  60MIN
PORT ORFORD OR       42.7N 124.5W  1534Z   0.52M /  1.7FT  16MIN
HONIARA SB            9.4S 160.0E  1402Z   0.21M /  0.7FT  72MIN
MANUS PG              2.0S 147.4E  1425Z   0.93M /  3.1FT  34MIN
HONOLULU OAHU        21.3N 157.9W  1410Z   0.71M /  2.3FT  32MIN
KANTON KI             2.8S 171.7W  1425Z   0.05M /  0.2FT  10MIN
CHRISTMAS KI          2.0N 157.5W  1447Z   0.56M /  1.9FT  52MIN
KAWAIHAE HAWAII      20.0N 155.8W  1413Z   1.22M /  4.0FT  14MIN
HILO HAWAII          19.7N 155.1W  1409Z   1.41M /  4.6FT  36MIN
BETIO TARAWA KI       1.4N 172.9E  1225Z   0.21M /  0.7FT  24MIN
NAURU                 0.5S 166.9E  1156Z   0.20M /  0.7FT  24MIN
NAWILIWILI KAUAI     22.0N 159.4W  1343Z   0.76M /  2.5FT  12MIN
DART 51407           19.6N 156.5W  1337Z   0.15M /  0.5FT  14MIN
KAHULUI MAUI         20.9N 156.5W  1327Z   1.74M /  5.7FT  52MIN
BARBERS PT HI        21.3N 158.1W  1308Z   0.70M /  2.3FT  64MIN
TERN FR. FRIGATE US  23.9N 166.3W  1224Z   0.38M /  1.2FT  16MIN
JOHNSTON US          16.7N 169.5W  1206Z   0.20M /  0.7FT  72MIN
DART 52402           11.7N 154.2E  0931Z   0.29M /  0.9FT  22MIN
DART 46403           52.7N 156.9W  1127Z   0.09M /  0.3FT  60MIN
LEGASPI PH           13.1N 123.8E  1116Z   0.25M /  0.8FT  58MIN
KWAJALEIN MH          8.7N 167.7E  1111Z   0.55M /  1.8FT  48MIN
NIKOLSKI AK          52.9N 168.9W  1109Z   0.27M /  0.9FT  64MIN
HANASAKI HOKKAIDO J  43.3N 145.6E  0656Z   1.83M /  6.0FT  24MIN
MIDWAY               28.2N 177.4W  1048Z   1.27M /  4.2FT  12MIN
TOSASHIMIZU SHIKOKU  32.8N 133.0E  0946Z   0.84M /  2.8FT  28MIN
ADAK AK              51.9N 176.6W  1034Z   0.35M /  1.2FT  22MIN
YAP FM                9.5N 138.1E  1013Z   0.15M /  0.5FT  88MIN
DART 21415           50.2N 171.8E  0845Z   0.27M /  0.9FT  52MIN
WAKE US              19.3N 166.6E  0928Z   0.39M /  1.3FT  14MIN
NAHA OKINAWA JP      26.2N 127.7E  0901Z   0.25M /  0.8FT  60MIN
SAIPAN US            15.2N 145.7E  0916Z   0.65M /  2.1FT  30MIN
OMAEZAKI HONSHU JP   34.6N 138.2E  0818Z   1.42M /  4.6FT  56MIN
DART 21419           44.5N 155.7E  0716Z   0.40M /  1.3FT  20MIN
DART 21413           30.5N 152.1E  0659Z   0.76M /  2.5FT  32MIN
DART 21401           42.6N 152.6E  0643Z   0.67M /  2.2FT  40MIN
DART 21418           38.7N 148.7E  0619Z   1.08M /  3.5FT  06MIN
LAT  - LATITUDE (N-NORTH, S-SOUTH)
LON  - LONGITUDE (E-EAST, W-WEST)
TIME - TIME OF THE MEASUREMENT (Z IS UTC IS GREENWICH TIME)
AMPL - TSUNAMI AMPLITUDE MEASURED RELATIVE TO NORMAL SEA LEVEL.
    IT IS ...NOT... CREST-TO-TROUGH WAVE HEIGHT.
    VALUES ARE GIVEN IN BOTH METERS(M) AND FEET(FT).
PER  - PERIOD OF TIME IN MINUTES(MIN) FROM ONE WAVE TO THE NEXT.
NOTE - DART MEASUREMENTS ARE FROM THE DEEP OCEAN AND THEY
    ARE GENERALLY MUCH SMALLER THAN WOULD BE COASTAL
     MEASUREMENTS AT SIMILAR LOCATIONS.
EVALUATION
SEA LEVEL READINGS CONFIRM THAT A TSUNAMI HAS BEEN GENERATED
WHICH COULD CAUSE WIDESPREAD DAMAGE. AUTHORITIES SHOULD TAKE
APPROPRIATE ACTION IN RESPONSE TO THIS THREAT. THIS CENTER WILL
CONTINUE TO MONITOR SEA LEVEL DATA TO DETERMINE THE EXTENT AND
SEVERITY OF THE THREAT.
A TSUNAMI IS A SERIES OF WAVES AND THE FIRST WAVE MAY NOT BE THE
LARGEST. TSUNAMI WAVE HEIGHTS CANNOT BE PREDICTED AND CAN VARY
SIGNIFICANTLY ALONG A COAST DUE TO LOCAL EFFECTS. THE TIME FROM
ONE TSUNAMI WAVE TO THE NEXT CAN BE FIVE MINUTES TO AN HOUR, AND
THE THREAT CAN CONTINUE FOR MANY HOURS AS MULTIPLE WAVES ARRIVE.
FOR ALL AREAS - WHEN NO MAJOR WAVES ARE OBSERVED FOR TWO HOURS
AFTER THE ESTIMATED TIME OF ARRIVAL OR DAMAGING WAVES HAVE NOT
OCCURRED FOR AT LEAST TWO HOURS THEN LOCAL AUTHORITIES CAN ASSUME
THE THREAT IS PASSED. DANGER TO BOATS AND COASTAL STRUCTURES CAN
CONTINUE FOR SEVERAL HOURS DUE TO RAPID CURRENTS. AS LOCAL
CONDITIONS CAN CAUSE A WIDE VARIATION IN TSUNAMI WAVE ACTION THE
ALL CLEAR DETERMINATION MUST BE MADE BY LOCAL AUTHORITIES.
BULLETINS WILL BE ISSUED HOURLY OR SOONER IF CONDITIONS WARRANT.
THE TSUNAMI WARNING WILL REMAIN IN EFFECT UNTIL FURTHER NOTICE.
THE JAPAN METEOROLOGICAL AGENCY MAY ALSO ISSUE TSUNAMI MESSAGES
FOR THIS EVENT TO COUNTRIES IN THE NORTHWEST PACIFIC AND SOUTH
CHINA SEA REGION.  IN CASE OF CONFLICTING INFORMATION... THE
MORE CONSERVATIVE INFORMATION SHOULD BE USED FOR SAFETY.
THE WEST COAST/ALASKA TSUNAMI WARNING CENTER WILL ISSUE PRODUCTS
FOR ALASKA...BRITISH COLUMBIA...WASHINGTON...OREGON...CALIFORNIA.