http://tsunami.gov/events/PAAQ/2018/01/23/p3054t/5/WEAK51/WEAK51.txt

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.

$$