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Created January 23, 2018 12:25
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WEAK51.txt
WEAK51 PAAQ 231212
TSUAK1
BULLETIN
Public Tsunami Message Number 5
NWS National Tsunami Warning Center Palmer AK
312 AM AKST Tue Jan 23 2018
UPDATES
-------
* A tsunami has been confirmed and some impacts are expected
* Updated observations
* Revised alert areas
...A TSUNAMI ADVISORY IS NOW IN EFFECT...
Tsunami Advisory in Effect for;
* SOUTH ALASKA AND THE ALASKA PENINSULA, Pacific coasts from
Hinchinbrook Entrance, Alaska (90 miles E of Seward) to
Chignik Bay, Alaska
Alerts in the following areas have been canceled because
additional information and analysis have better defined the
threat.
* The Tsunami Watch is canceled for the coastal areas of
California, Oregon and Washington from The Cal./Mexico
Border to The Wash./BC Border
* The Tsunami Warning is canceled for the coastal areas of
British Columbia, Southeast Alaska and South Alaska and the
Alaska Peninsula from The Wash./BC Border to Hinchinbrook
Entrance, Alaska (90 miles E of Seward)
* The Tsunami Warning is canceled for the coastal areas of
South Alaska and the Alaska Peninsula and Aleutian Islands
from Chignik Bay, Alaska to Attu, Alaska
For other US and Canadian Pacific coasts in North America,
there is no tsunami threat.
FORECASTS OF TSUNAMI ACTIVITY
-----------------------------
* A tsunami has been generated. The first waves are forecasted to
arrive at the following locations and specified times.
* Forecast tsunami duration is the approximate length of time which
the tsunami may produce dangerous currents and waves.
* Forecast max tsunami height is the highest expected water level
above the tide.
* Forecasts are not provided for sites which have been impacted
more than an hour prior to the time of this message.
FORECAST FORECAST FORECAST
START TSUNAMI MAX TSUNAMI
SITE OF TSUNAMI DURATION HEIGHT
---- ---------- -------- -------------
* Alaska
Homer 0250 AKST Jan 23 less than 1ft
OBSERVATIONS OF TSUNAMI ACTIVITY - UPDATED
------------------------------------------
* Observed max tsunami height is the highest recorded water level
above the tide level up to the time of this message.
TIME OBSERVED MAX
SITE OF MEASUREMENT TSUNAMI HEIGHT
---------------------------- ---------------- --------------
Kodiak Alaska 0329 PST Jan 23 0.6ft
Seward Alaska 0331 PST Jan 23 0.4ft
Old Harbor Alaska 0338 PST Jan 23 0.7ft
Sitka Alaska 0318 PST Jan 23 0.4ft
Yakutat Alaska 0335 PST Jan 23 0.5ft
PRELIMINARY EARTHQUAKE PARAMETERS
---------------------------------
* Magnitude 7.9
* Origin Time 0032 AKST Jan 23 2018
0132 PST Jan 23 2018
0932 UTC Jan 23 2018
* Coordinates 56.0 North 149.1 West
* Depth 12 miles
* Location 175 miles SE of Kodiak City, Alaska
360 miles S of Anchorage, Alaska
RECOMMENDED ACTIONS - UPDATED
-----------------------------
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 30 minutes.
$$
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