Jul 18, 2017

[Tsunami Message - IOC] NWS-NTWC Tsunami Advisory

WEAK51 PAAQ 180008
TSUAK1

BULLETIN
Public Tsunami Message Number 1
NWS National Tsunami Warning Center Palmer AK
508 PM PDT Mon Jul 17 2017

..A TSUNAMI ADVISORY IS NOW IN EFFECT...



Tsunami Advisory in Effect for;

* ALEUTIAN ISLANDS, Samalga Pass, Alaska (30 miles SW of
Nikolski) to Attu, Alaska including the Pribilof Islands


For other US and Canadian Pacific coasts in North America,
the level of tsunami danger is being evaluated. Further
information will be provided in supplementary messages.


PRELIMINARY EARTHQUAKE PARAMETERS
---------------------------------
* The following parameters are based on a rapid preliminary
assessment and changes may occur.

* Magnitude 7.8 - REVISED
* Origin Time 1534 AKDT Jul 17 2017
1634 PDT Jul 17 2017
2334 UTC Jul 17 2017
* Coordinates 54.5 North 168.9 East
* Depth 6 miles
* Location 120 miles SE of Bering I., Komandorski
430 miles E of Petropavlovsk, Kamchatka


FORECASTS OF TSUNAMI ACTIVITY
-----------------------------
* Tsunami activity is forecasted to start at the following
locations at the specified times.

FORECAST
START
SITE OF TSUNAMI
---- ----------

* Alaska
Shemya 1615 AKDT Jul 17
Adak 1720 AKDT Jul 17
Saint Paul 1830 AKDT Jul 17


OBSERVATIONS OF TSUNAMI ACTIVITY
--------------------------------
* No tsunami observations are available to report.


RECOMMENDED ACTIONS
-------------------
Actions to protect human life and property will
vary within tsunami advisory areas.

If you are in a tsunami 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 advisory
areas.

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.

* 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.

* Pacific coastal residents outside California, Oregon,
Washington, British Columbia and Alaska should refer to the
Pacific Tsunami Warning Center messages at tsunami.gov.

* This message will be updated within 60 minutes.

$$

Current time zone offset : UTC/GMT +3 hours: