La veille du tsunami dans tout le Pacifique annulée après le tremblement de terre massif de 8,2 en Alaska
- Une série de tremblements de terre massifs secouent actuellement la péninsule de l’Alaska.
- Le séisme le plus grave a été mesuré à 22 h 15, heure locale, avec une force de 8,2 , à 2 h 15 HNE.
- Des avertissements de tsunami sont affichés pour certaines parties des côtes de l’Alaska, une veille de tsunami est émise pour Hawaï, des avis pour d’autres régions et une menace de tsunami pour Guam et Saipan est sous enquête. Données sur le tsunami fournies à d’autres pays du Pacifique par l’USGS
L’USGS vient de publier une prédiction selon laquelle les vagues du tsunami menaçant les côtes de l’ensemble de l’océan Pacifique seront à moins de 0,3 mètre au-dessus de la marée.
Avec cela, la montre Tsunami pour Hawaï a été annulée. Une déclaration a été publiée selon laquelle il n’y a plus de menace de tsunami pour Guam, Saipan et les îles environnantes.
Dans d’autres endroits, les tsunamis ont été connus pour monter verticalement jusqu’à 100 pieds (30 mètres). La plupart des tsunamis font monter la mer de pas plus de 10 pieds (3 mètres). Le tsunami de l’océan Indien a provoqué des vagues pouvant atteindre 9 mètres (30 pieds) à certains endroits, selon des reportages.
C’est une bonne nouvelle de prédire qu’un tsunami dévastateur pourrait ne pas être réaliste après le séisme de 8,2 de ce soir en Alaska.
TSUNAMI WAVES are forecast to be less than 0.3 meters above tide in:
AMERICAN SAMOA... AUSTRALIA... CHILE... CHINA... CHUUK...
COLOMBIA... COOK ISLANDS... COSTA RICA... ECUADOR... EL
SALVADOR... FIJI... FRENCH POLYNESIA... GUAM...
GUATEMALA... HAWAII... HONDURAS... HOWLAND AND BAKER...
INDONESIA... JAPAN... JARVIS ISLAND... JOHNSTON ATOLL...
KERMADEC ISLANDS... KIRIBATI... KOSRAE... MARSHALL
ISLANDS... MEXICO... MIDWAY ISLAND... NAURU... NEW
CALEDONIA... NEW ZEALAND... NICARAGUA... NIUE... NORTHERN
MARIANAS... NORTHWESTERN HAWAIIAN ISLANDS... PALAU...
PALMYRA ISLAND... PANAMA... PAPUA NEW GUINEA... PERU...
PHILIPPINES... PITCAIRN ISLANDS... POHNPEI... RUSSIA...
SAMOA... SOLOMON ISLANDS... TAIWAN... TOKELAU... TONGA...
TUVALU... VANUATU... WAKE ISLAND... WALLIS AND FUTUNA...
AND YAP.
* ACTUAL AMPLITUDES AT THE COAST MAY VARY FROM FORECAST
AMPLITUDES DUE TO UNCERTAINTIES IN THE FORECAST AND LOCAL
FEATURES. IN PARTICULAR MAXIMUM TSUNAMI AMPLITUDES ON ATOLLS
AND AT LOCATIONS WITH FRINGING OR BARRIER REEFS WILL LIKELY
BE MUCH SMALLER THAN THE FORECAST INDICATES.
* FOR OTHER AREAS COVERED BY THIS PRODUCT A FORECAST HAS NOT
YET BEEN COMPUTED. THE FORECAST WILL BE EXPANDED IF
NECESSARY IN SUBSEQUENT PRODUCTS.
Le tremblement de terre s’est produit dans la péninsule de l’Alaska à 16 h 16 CHST le jeudi 29 juillet 2021. Un avis de tsunami est actuellement annoncé pour le col Amchitka, en Alaska (125 milles à l’ouest d’Adak), le col Samalga, en Alaska (30 milles au sud-ouest de Nikolski ). Ceci a été publié le 28/07/2021, 21:01:58 pm.
Tsunami Warning in Effect for;
* SOUTH ALASKA AND THE ALASKA PENINSULA, Pacific coasts from
Hinchinbrook Entrance, Alaska (90 miles E of Seward) to
Unimak Pass, Alaska (80 miles NE of Unalaska)
* ALEUTIAN ISLANDS, Unimak Pass, Alaska (80 miles NE of
Unalaska) to Samalga Pass, Alaska (30 miles SW of Nikolski)
Tsunami Advisory in Effect for;
* SOUTHEAST ALASKA, The inner and outer coast from Cape
Decision, Alaska (85 miles SE of Sitka) to Cape
Fairweather, Alaska (80 miles SE of Yakutat)
* SOUTH ALASKA AND THE ALASKA PENINSULA, Pacific coasts from
Cape Fairweather, Alaska (80 miles SE of Yakutat) to
Hinchinbrook Entrance, Alaska (90 miles E of Seward)
* ALEUTIAN ISLANDS, Samalga Pass, Alaska (30 miles SW of
Nikolski) to Amchitka Pass, Alaska (125 miles W of Adak)
including the Pribilof Islands
Actions to protect human life and property will
vary within tsunami warning areas and within tsunami
advisory areas.
If you are in a tsunami warning area;
* Evacuate inland or to higher ground above and beyond
designated tsunami hazard zones or move to an upper floor
of a multi-story building depending on your situation.
If you are in a tsunami warning or advisory area;
* Move out of the water, off the beach, and away from
harbors, marinas, breakwaters, bays and inlets.
* Be alert to and follow instructions from your local
emergency officials because they may have more detailed or
specific information for your location.
* If you feel a strong earthquake or extended ground rolling
take immediate protective actions such as moving inland
and/or uphill preferably by foot.
* Boat operators,
* Where time and conditions permit, move your boat out to
sea to a depth of at least 180 feet.
* If at sea avoid entering shallow water, harbors,
marinas, bays, and inlets to avoid floating and
submerged debris and strong currents.
* Do not go to the shore to observe the tsunami.
* Do not return to the coast until local emergency officials
indicate it is safe to do so.
IMPACTS
-------
Impacts will vary at different locations in the warning and
in the advisory areas.
If you are in a tsunami warning area;
* A tsunami with damaging waves and powerful currents is
possible.
* Repeated coastal flooding is possible as waves arrive
onshore, move inland, and drain back into the ocean.
* Strong and unusual waves, currents and inland flooding
can drown or injure people and weaken or destroy structures
on land and in water.
* Water filled with floating or submerged debris that can
injure or kill people and weaken or destroy buildings and
bridges is possible.
* Strong and unusual currents and waves in harbors,
marinas, bays, and inlets may be especially
destructive.
If you are in a tsunami advisory area;
* A tsunami with strong waves and currents is possible.
* Waves and currents can drown or injure people who are
in the water.
* Currents at beaches and in harbors, marinas,
bays, and inlets may be especially dangerous.
If you are in a tsunami warning or advisory area;
* Some impacts may continue for many hours to days after
arrival of the first wave.
* The first wave may not be the largest so later waves may
be larger.
* Each wave may last 5 to 45 minutes as a wave encroaches
and recedes.
* Coasts facing all directions are threatened because the
waves can wrap around islands and headlands and into bays.
* Strong shaking or rolling of the ground indicates an
earthquake has occurred and a tsunami may be imminent.
* A rapidly receding or receded shoreline, unusual waves and
sounds, and strong currents are signs of a tsunami.
* The tsunami may appear as water moving rapidly out to sea,
a gentle rising tide like flood with no breaking wave,
as a series of breaking waves, or a frothy wall of water.
ADDITIONAL INFORMATION AND NEXT UPDATE
--------------------------------------
* Refer to the internet site tsunami.gov for more information.
Il n’y a plus de menace d’impact de tsunami pour la région de Guam Saipan et Hawaï. La veille du tsunami pour Hawaï est annulée
L’emplacement du tremblement de terre était de 5,5 nord et 157,9 ouest. La profondeur était de 11 milles.
Il n’y a aucun dommage ou blessure prévu pour aucune zone terrestre en Alaska pour le moment. Aucune menace de tsunami n’a été émise pour Hawaï ou toute autre région côtière des États-Unis ou du Canada.
★★★★★
