Tsunami Watch/Warning
Issued by NWS

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000
WEAK51 PAAQ 160822
TSUAK1

BULLETIN
Public Tsunami Message Number 4
NWS National Tsunami Warning Center Palmer AK
1222 AM AKDT Sun Jul 16 2023

UPDATES
-------
 * There are no updates in this message


...THE TSUNAMI ADVISORY REMAINS IN EFFECT...



Tsunami Advisory in Effect for;

 * SOUTH ALASKA AND THE ALASKA PENINSULA, Pacific coasts from
   Chignik Bay, Alaska to Unimak Pass, Alaska (80 miles NE of
   Unalaska)


For other US and Canadian Pacific coasts in North America,
there is no tsunami threat.


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

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

 * Alaska
Sand Point       0010 AKDT Jul 16
Cold Bay         0135 AKDT Jul 16


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


PRELIMINARY EARTHQUAKE PARAMETERS
---------------------------------

 * Magnitude      7.2
 * Origin Time    2248 AKDT Jul 15 2023
                  2348  PDT Jul 15 2023
                  0648  UTC Jul 16 2023
 * Coordinates    54.5 North 160.8 West
 * Depth          13 miles
 * Location       55 miles SW of Sand Point, Alaska
                  615 miles SW of Anchorage, Alaska


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 30 minutes.

$$


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