M 8.2 Earthquake and Tsunami (2.6 m) in United States on 29 Jul 2021 06:15 UTC

Global Telecommunication Service

GTS (Global Telecommunication Service) is the official Warning and Alerting channel by the World Meteorological Organization (WMO) adopted by several Warning Organizations. As soon as a new GTS message regarding Tropical Cyclones(WT) or Tsunami(WE) the messages are processed and possibly assigned to the specific event. When a new GTS message is present an new tab in the specific event report page is present.The presence of a GTS message is shown in the homepage with a dedicated icon.

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2021-07-29 09:08 message from JMA


Original Message :

WEPA40 RJTD 290908
TSUNAMI BULLETIN ISSUED BY JMA AT 0908Z 29 JUL

ORIGIN TIME 0616Z 29 JUL
PRELIMINARY EPICENTER LAT 55.5 N. LON 157.9 W.
ALEUTIAN ISLANDS
FOCAL DEPTH /// KM MAG 8.2

NO SIGNIFICANT TSUNAMI IS EXPECTED IN COASTAL AREAS OF JAPAN
NO FURTHER ACTION WILL BE TAKEN
=

>

2021-07-29 08:34 message from NTWC

Tsunami Observations

  • The following are tsunami wave observations from coastal and/or deep-ocean sea level gauges at the indicated locations the maximum tsunami height is measured with respect to the normal tide level
GAUGE LOCATIONLATLONTIME (UTC)HEIGHT (m)PERIOD (min)
Sand Point (Alaska)55.33-160.4900:420.15-
Old Harbor (Alaska)57.2-153.3100:570.21-


Original Message :

WEAK51 PAAQ 290831
TSUAK1

BULLETIN
Public Tsunami Message Number 5
NWS National Tsunami Warning Center Palmer AK
1231 AM AKDT Thu Jul 29 2021

UPDATES
-------
* A tsunami has been confirmed and some impacts are expected
* Updated observations
* Revised alert areas


...THE TSUNAMI ADVISORY REMAINS 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
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)


Alerts in the following areas have been canceled because
additional information and analysis have better defined the
threat.

* The Tsunami Advisory is canceled for the coastal areas of
Aleutian Islands from Samalga Pass, Alaska (30 miles SW of
Nikolski) to Amchitka Pass, Alaska (125 miles W of Adak)


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.


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
Unalaska 2350 AKDT Jul 28 less than 1ft
Cold Bay 2355 AKDT Jul 28 less than 1ft
Kodiak 2355 AKDT Jul 28 less than 1ft
Seward 0020 AKDT Jul 29 less than 1ft
Homer 0115 AKDT Jul 29 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
---------------------------- ---------------- --------------
Sand Point Alaska 0042 PDT Jul 29 0.5ft
Old Harbor Alaska 0057 PDT Jul 29 0.7ft


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

* Magnitude 8.2
* Origin Time 2216 AKDT Jul 28 2021
2316 PDT Jul 28 2021
0616 UTC Jul 29 2021
* Coordinates 55.3 North 157.8 West
* Depth 20 miles
* Location 75 miles SE of Chignik, Alaska
500 miles SW 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.

$$

>

2021-07-29 08:02 message from NTWC


Original Message :

WEAK51 PAAQ 290800
TSUAK1

BULLETIN
Public Tsunami Message Number 4
NWS National Tsunami Warning Center Palmer AK
1200 AM AKDT Thu Jul 29 2021

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


...THE TSUNAMI WARNING REMAINS IN EFFECT...


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


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


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.


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
Unalaska 2350 AKDT Jul 28 less than 1ft
Cold Bay 2355 AKDT Jul 28 less than 1ft
Kodiak 2355 AKDT Jul 28 less than 1ft
Adak 0015 AKDT Jul 29 less than 1ft
Seward 0020 AKDT Jul 29 less than 1ft
Elfin Cove 0025 AKDT Jul 29 less than 1ft
Sitka 0030 AKDT Jul 29 less than 1ft
Yakutat 0030 AKDT Jul 29 less than 1ft
Valdez 0040 AKDT Jul 29 less than 1ft
Cordova 0050 AKDT Jul 29 less than 1ft
Saint Paul 0110 AKDT Jul 29 less than 1ft
Homer 0115 AKDT Jul 29 less than 1ft


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


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

* Magnitude 8.2
* Origin Time 2216 AKDT Jul 28 2021
2316 PDT Jul 28 2021
0616 UTC Jul 29 2021
* Coordinates 55.3 North 157.8 West
* Depth 20 miles
* Location 75 miles SE of Chignik, Alaska
500 miles SW of Anchorage, Alaska


RECOMMENDED ACTIONS
-------------------
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.

* 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.

$$

>

2021-07-29 07:55 message from NTWC

Key information extracted from original GTS message :
Evaluation

  • An earthquake with a preliminary magnitude of 8.2 occurred in the alaska peninsula at 0616 UTC on thursday JULY 29 2021
  • Based on all available data the TSUNAMI threat from this earthquake has now passed
  • Readings from deep ocean gauges verify that a significant TSUNAMI is not expected for the coastal areas covered by this message
  • National TSUNAMI warning center are still under a TSUNAMI warning

Original Message :

WEPA40 PHEB 290754
TSUPAC

TSUNAMI MESSAGE NUMBER 3
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
0749 UTC THU JUL 29 2021

...PTWC FINAL TSUNAMI THREAT MESSAGE...


**** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****

THIS MESSAGE IS ISSUED FOR INFORMATION ONLY IN SUPPORT OF THE
UNESCO/IOC PACIFIC TSUNAMI WARNING AND MITIGATION SYSTEM AND IS
MEANT FOR NATIONAL AUTHORITIES IN EACH COUNTRY OF THAT SYSTEM.

NATIONAL AUTHORITIES WILL DETERMINE THE APPROPRIATE LEVEL OF
ALERT FOR EACH COUNTRY AND MAY ISSUE ADDITIONAL OR MORE REFINED
INFORMATION.

**** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****

THE TSUNAMI FORECAST IS UNCHANGED IN THIS MESSAGE.


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

* MAGNITUDE 8.2
* ORIGIN TIME 0616 UTC JUL 29 2021
* COORDINATES 55.5 NORTH 157.9 WEST
* DEPTH 17 KM / 11 MILES
* LOCATION ALASKA PENINSULA


EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 8.2 OCCURRED IN
THE ALASKA PENINSULA AT 0616 UTC ON THURSDAY JULY 29 2021.

* BASED ON ALL AVAILABLE DATA... THE TSUNAMI THREAT FROM THIS
EARTHQUAKE HAS NOW PASSED. READINGS FROM DEEP OCEAN GAUGES
VERIFY THAT A SIGNIFICANT TSUNAMI IS NOT EXPECTED FOR THE
COASTAL AREAS COVERED BY THIS MESSAGE. HOWEVER, SOME COASTS
LOCATED CLOSER TO THE EARTHQUAKE THAT ARE COVERED BY THE U.S.
NATIONAL TSUNAMI WARNING CENTER ARE STILL UNDER A TSUNAMI
WARNING.


TSUNAMI THREAT FORECAST...UPDATED
---------------------------------

* THERE IS NO LONGER A TSUNAMI THREAT FROM THIS EARTHQUAKE
FOR COASTS COVERED BY THIS MESSAGE.


RECOMMENDED ACTIONS
-------------------

* REMAIN OBSERVANT AND EXERCISE NORMAL CAUTION NEAR THE SEA.
OTHERWISE... NO ACTION IS REQUIRED.


POTENTIAL IMPACTS
-----------------

* MINOR SEA LEVEL FLUCTUATIONS MAY OCCUR IN SOME COASTAL AREAS
OVER THE NEXT FEW HOURS.


NEXT UPDATE AND ADDITIONAL INFORMATION
--------------------------------------

* THIS WILL BE THE FINAL STATEMENT ISSUED FOR THIS EVENT UNLESS
NEW INFORMATION IS RECEIVED OR THE SITUATION CHANGES.

* AUTHORITATIVE INFORMATION ABOUT THE EARTHQUAKE FROM THE U.S.
GEOLOGICAL SURVEY CAN BE FOUND ON THE INTERNET AT
EARTHQUAKE.USGS.GOV.

* FURTHER INFORMATION ABOUT THIS EVENT MAY BE FOUND AT
WWW.TSUNAMI.GOV.

* COASTAL REGIONS OF HAWAII... AMERICAN SAMOA... GUAM... AND
CNMI SHOULD REFER TO PACIFIC TSUNAMI WARNING CENTER MESSAGES
SPECIFICALLY FOR THOSE PLACES THAT CAN BE FOUND AT
WWW.TSUNAMI.GOV.

* COASTAL REGIONS OF CALIFORNIA... OREGON... WASHINGTON...
BRITISH COLUMBIA AND ALASKA SHOULD ONLY REFER TO U.S.
NATIONAL TSUNAMI WARNING CENTER MESSAGES THAT CAN BE FOUND
AT WWW.TSUNAMI.GOV.

$$

>

2021-07-29 07:32 message from NTWC


Original Message :

WEAK51 PAAQ 290731
TSUAK1

BULLETIN
Public Tsunami Message Number 3
NWS National Tsunami Warning Center Palmer AK
1131 PM AKDT Wed Jul 28 2021

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


...THE TSUNAMI WARNING REMAINS IN EFFECT...


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


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


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.


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 2255 AKDT Jul 28
Unalaska 2350 AKDT Jul 28
Cold Bay 2355 AKDT Jul 28
Kodiak 2355 AKDT Jul 28
Adak 0015 AKDT Jul 29
Seward 0020 AKDT Jul 29
Elfin Cove 0025 AKDT Jul 29
Sitka 0030 AKDT Jul 29
Yakutat 0030 AKDT Jul 29
Valdez 0040 AKDT Jul 29
Cordova 0050 AKDT Jul 29
Saint Paul 0110 AKDT Jul 29
Homer 0115 AKDT Jul 29


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


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

* Magnitude 8.2
* Origin Time 2216 AKDT Jul 28 2021
2316 PDT Jul 28 2021
0616 UTC Jul 29 2021
* Coordinates 55.3 North 157.8 West
* Depth 20 miles
* Location 75 miles SE of Chignik, Alaska
500 miles SW of Anchorage, Alaska


RECOMMENDED ACTIONS
-------------------
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.

* 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.

$$

>

2021-07-29 07:30 message from NTWC

Key information extracted from original GTS message :
Evaluation

  • An earthquake with a preliminary magnitude of 8.2 occurred in the alaska peninsula at 0616 UTC on thursday JULY 29 2021
  • Based on all available data hazardous TSUNAMI waves are not forecast for any coasts covered by this product
  • We are continuing to evaluate based on still arriving data

Original Message :

WEPA40 PHEB 290729
TSUPAC

TSUNAMI MESSAGE NUMBER 2
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
0726 UTC THU JUL 29 2021

...PTWC TSUNAMI THREAT MESSAGE...


**** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****

THIS MESSAGE IS ISSUED FOR INFORMATION ONLY IN SUPPORT OF THE
UNESCO/IOC PACIFIC TSUNAMI WARNING AND MITIGATION SYSTEM AND IS
MEANT FOR NATIONAL AUTHORITIES IN EACH COUNTRY OF THAT SYSTEM.

NATIONAL AUTHORITIES WILL DETERMINE THE APPROPRIATE LEVEL OF
ALERT FOR EACH COUNTRY AND MAY ISSUE ADDITIONAL OR MORE REFINED
INFORMATION.

**** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****

THE TSUNAMI FORECAST IS UPDATED IN THIS MESSAGE.

THE MAGNITUDE HAS INCREASED TO 8.2.


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

* MAGNITUDE 8.2
* ORIGIN TIME 0616 UTC JUL 29 2021
* COORDINATES 55.5 NORTH 157.9 WEST
* DEPTH 17 KM / 11 MILES
* LOCATION ALASKA PENINSULA


EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 8.2 OCCURRED IN
THE ALASKA PENINSULA AT 0616 UTC ON THURSDAY JULY 29 2021.

* BASED ON ALL AVAILABLE DATA... HAZARDOUS TSUNAMI WAVES ARE
NOT FORECAST FOR ANY COASTS COVERED BY THIS PRODUCT. HOWEVER...
WE ARE CONTINUING TO EVALUATE BASED ON STILL ARRIVING DATA.


TSUNAMI THREAT FORECAST...UPDATED
---------------------------------

* TSUNAMI WAVES ARE FORECAST TO BE LESS THAN 0.3 METERS ABOVE
THE TIDE LEVEL FOR THE COASTS OF

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.


RECOMMENDED ACTIONS
-------------------

* GOVERNMENT AGENCIES RESPONSIBLE FOR THREATENED COASTAL AREAS
SHOULD TAKE ACTION TO INFORM AND INSTRUCT ANY COASTAL
POPULATIONS AT RISK IN ACCORDANCE WITH THEIR OWN
EVALUATION... PROCEDURES AND THE LEVEL OF THREAT.

* PERSONS LOCATED IN THREATENED COASTAL AREAS SHOULD STAY ALERT
FOR INFORMATION AND FOLLOW INSTRUCTIONS FROM NATIONAL AND
LOCAL AUTHORITIES.


POTENTIAL IMPACTS
-----------------

* A TSUNAMI IS A SERIES OF WAVES. THE TIME BETWEEN WAVE CRESTS
CAN VARY FROM 5 MINUTES TO AN HOUR. THE HAZARD MAY PERSIST
FOR MANY HOURS OR LONGER AFTER THE INITIAL WAVE.

* IMPACTS CAN VARY SIGNIFICANTLY FROM ONE SECTION OF COAST TO
THE NEXT DUE TO LOCAL BATHYMETRY AND THE SHAPE AND ELEVATION
OF THE SHORELINE.

* IMPACTS CAN ALSO VARY DEPENDING UPON THE STATE OF THE TIDE AT
THE TIME OF THE MAXIMUM TSUNAMI WAVES.

* PERSONS CAUGHT IN THE WATER OF A TSUNAMI MAY DROWN... BE
CRUSHED BY DEBRIS IN THE WATER... OR BE SWEPT OUT TO SEA.


NEXT UPDATE AND ADDITIONAL INFORMATION
--------------------------------------

* THE NEXT MESSAGE WILL BE ISSUED IN ONE HOUR... OR SOONER IF
THE SITUATION WARRANTS.

* AUTHORITATIVE INFORMATION ABOUT THE EARTHQUAKE FROM THE U.S.
GEOLOGICAL SURVEY CAN BE FOUND ON THE INTERNET AT
EARTHQUAKE.USGS.GOV.

* FURTHER INFORMATION ABOUT THIS EVENT MAY BE FOUND AT
WWW.TSUNAMI.GOV.

* COASTAL REGIONS OF HAWAII... AMERICAN SAMOA... GUAM... AND
CNMI SHOULD REFER TO PACIFIC TSUNAMI WARNING CENTER MESSAGES
SPECIFICALLY FOR THOSE PLACES THAT CAN BE FOUND AT
WWW.TSUNAMI.GOV.

* COASTAL REGIONS OF CALIFORNIA... OREGON... WASHINGTON...
BRITISH COLUMBIA AND ALASKA SHOULD ONLY REFER TO U.S.
NATIONAL TSUNAMI WARNING CENTER MESSAGES THAT CAN BE FOUND
AT WWW.TSUNAMI.GOV.

$$

>

2021-07-29 07:02 message from NTWC


Original Message :

WEAK51 PAAQ 290701
TSUAK1

BULLETIN
Public Tsunami Message Number 2
NWS National Tsunami Warning Center Palmer AK
1101 PM AKDT Wed Jul 28 2021

UPDATES
-------
* Revised magnitude


...THE TSUNAMI WARNING REMAINS IN EFFECT...


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


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


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 - UPDATED
-------------------------------------------

* The following parameters are based on a rapid preliminary
assessment of the earthquake and changes may occur.

* Magnitude 8.2
* Origin Time 2216 AKDT Jul 28 2021
2316 PDT Jul 28 2021
0616 UTC Jul 29 2021
* Coordinates 55.3 North 157.8 West
* Depth 20 miles
* Location 75 miles SE of Chignik, Alaska
500 miles SW of Anchorage, Alaska


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 2255 AKDT Jul 28
Unalaska 2350 AKDT Jul 28
Cold Bay 2355 AKDT Jul 28
Kodiak 2355 AKDT Jul 28
Adak 0015 AKDT Jul 29
Seward 0020 AKDT Jul 29
Elfin Cove 0025 AKDT Jul 29
Sitka 0030 AKDT Jul 29
Yakutat 0030 AKDT Jul 29
Valdez 0040 AKDT Jul 29
Cordova 0050 AKDT Jul 29
Saint Paul 0110 AKDT Jul 29
Homer 0115 AKDT Jul 29


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


RECOMMENDED ACTIONS
-------------------
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.

* 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.

$$

>

2021-07-29 06:28


Original Message :

WEIO24 AMMC 290628
---------------------------------------------------------------------
TSUNAMI BULLETIN NOTIFICATION MESSAGE NUMBER 2
IOTWMS TSUNAMI SERVICE PROVIDER AUSTRALIA [JATWC]
ISSUED AT 0628 UTC THURSDAY 29 JULY 2021
---------------------------------------------------------------------
TO: INDIAN OCEAN NATIONAL TSUNAMI WARNING CENTRES [NTWCs]
FROM: IOTWMS-TSP AUSTRALIA

NOTIFICATION:
IOTWMS-TSP AUSTRALIA HAS JUST ISSUED TSUNAMI BULLETIN NUMBER 2
FOR THE INDIAN OCEAN, BASED ON THE FOLLOWING EARTHQUAKE EVENT:

MAGNITUDE: 8.0 MWP
DEPTH: 17KM
DATE: 29 JUL 2021
ORIGIN TIME: 0615 UTC
LATITUDE: 55.47N
LONGITUDE: 157.93W
LOCATION: ALASKA PENINSULA

TO VIEW THE BULLETIN GO TO THE IOTWMS-TSP AUSTRALIA WEBSITE AT:

http://reg.bom.gov.au/tsunami/rtsp/index.shtml

NOTE: THIS IS A RESTRICTED-ACCESS WEBSITE CONTAINING TECHNICAL DATA
FOR NATIONAL TSUNAMI WARNING CENTRES ONLY. IT IS NOT FOR GENERAL
PUBLIC ACCESS.

GENERAL PUBLIC INFORMATION FOR THIS EVENT IS AVAILABLE FROM:

JOINT AUSTRALIAN TSUNAMI WARNING CENTRE [JATWC]
BUREAU OF METEOROLOGY
MELBOURNE, AUSTRALIA
http://www.bom.gov.au/tsunami

END OF NOTIFICATION MESSAGE
---------------------------------------------------------------------

>

2021-07-29 06:27


Original Message :

WEIO24 AMMC 290627
---------------------------------------------------------------------
TSUNAMI BULLETIN NOTIFICATION MESSAGE NUMBER 1
IOTWMS TSUNAMI SERVICE PROVIDER AUSTRALIA [JATWC]
ISSUED AT 0627 UTC THURSDAY 29 JULY 2021
---------------------------------------------------------------------
TO: INDIAN OCEAN NATIONAL TSUNAMI WARNING CENTRES [NTWCs]
FROM: IOTWMS-TSP AUSTRALIA

NOTIFICATION:
IOTWMS-TSP AUSTRALIA HAS JUST ISSUED TSUNAMI BULLETIN NUMBER 1
FOR THE INDIAN OCEAN, BASED ON THE FOLLOWING EARTHQUAKE EVENT:

MAGNITUDE: 8.0 MWP
DEPTH: 17KM
DATE: 29 JUL 2021
ORIGIN TIME: 0615 UTC
LATITUDE: 55.47N
LONGITUDE: 157.93W
LOCATION: ALASKA PENINSULA

TO VIEW THE BULLETIN GO TO THE IOTWMS-TSP AUSTRALIA WEBSITE AT:

http://reg.bom.gov.au/tsunami/rtsp/index.shtml

NOTE: THIS IS A RESTRICTED-ACCESS WEBSITE CONTAINING TECHNICAL DATA
FOR NATIONAL TSUNAMI WARNING CENTRES ONLY. IT IS NOT FOR GENERAL
PUBLIC ACCESS.

GENERAL PUBLIC INFORMATION FOR THIS EVENT IS AVAILABLE FROM:

JOINT AUSTRALIAN TSUNAMI WARNING CENTRE [JATWC]
BUREAU OF METEOROLOGY
MELBOURNE, AUSTRALIA
http://www.bom.gov.au/tsunami

END OF NOTIFICATION MESSAGE
---------------------------------------------------------------------

>

2021-07-29 06:26


Original Message :

WEIO22 WIIX 290625
TSP-INATEWS-20210729-0625-001
--------------------------------------------------------------------------------
TSUNAMI BULLETIN NOTIFICATION MESSAGE NUMBER 1
IOTWMS TSUNAMI SERVICE PROVIDER INDONESIA (INATEWS-BMKG)
ISSUED AT 0625 UTC, JUL 29, 2021
--------------------------------------------------------------------------------
TO: INDIAN OCEAN NATIONAL TSUNAMI WARNING CENTRES (NTWC)
FROM: IOTWMS-TSP INDONESIA

NOTIFICATION:
IOTWMS-TSP INDONESIA HAS JUST ISSUED TSUNAMI BULLETIN NUMBER 1 FOR
THE INDIAN OCEAN, BASED ON THE FOLLOWING EARTHQUAKE EVENT:

MAGNITUDE : 7.8 MWP
DEPTH : 10KM
DATE : 29 JUL 2021
ORIGIN TIME: 06:15:47 UTC
LATITUDE : 55.77N
LONGITUDE : 157.97W
LOCATION : ALASKA PENINSULA

TO VIEW THE BULLETIN GO TO THE IOTWMS-TSP INDONESIA WEBSITE AT:

HTTP://RTSP.BMKG.GO.ID

NOTE: THIS IS A RESTRICTED-ACCESS WEBSITE CONTAINING TECHNICAL DATA
FOR INDIAN OCEAN NATIONAL TSUNAMI WARNING CENTRES ONLY. IT IS NOT
FOR GENERAL PUBLIC ACCESS.

GENERAL PUBLIC INFORMATION FOR THIS EVENT IS AVAILABLE FROM:

INDONESIA TSUNAMI EARLY WARNING SYSTEM (INATEWS)
THE AGENCY FOR METEOROLOGY CLIMATOLOGY AND GEOPHYSICS (BMKG)
ADDRESS: JL. ANGKASA I NO.2 KEMAYORAN, JAKARTA, INDONESIA, 10720
TEL.: 62 (21) 65867045
FAX: 62 (21) 6546316
P.O. BOX 3540 JAKARTA
WEBSITE: HTTP://RTSP.BMKG.GO.ID/PUBLICBULL.PHP
EMAIL : INARTSP@BMKG.GO.ID
MONITRTWP@BMKG.GO.ID

END OF NOTIFICATION MESSAGE
--------------------------------------------------------------

>

2021-07-29 06:26


Original Message :

WEIO20 DEMS 290625
---------------------------------------------------------------------
TSUNAMI BULLETIN NOTIFICATION MESSAGE NUMBER 1
IOTWMS TSUNAMI SERVICE PROVIDER INDIA (ITEWC)
ISSUED AT 0625 UTC THURSDAY 29 JULY 2021
---------------------------------------------------------------------
TO: INDIAN OCEAN NATIONAL TSUNAMI WARNING CENTRES (NTWC)
FROM: IOTWMS-TSP INDIA
NOTIFICATION:
IOTWMS-TSP INDIA HAS JUST ISSUED TSUNAMI BULLETIN NUMBER 1
FOR THE INDIAN OCEAN, BASED ON THE FOLLOWING EARTHQUAKE EVENT:
Magnitude : 7.8
Depth : 10.0
Date : 29 Jul 2021
Origin Time : 0615 UTC
Latitude : 55.58 N
Longitude : 157.97 W
Location : Alaska Peninsula
TO VIEW THE BULLETIN GO TO THE IOTWMS-TSP INDIA WEBSITE AT:
https://tsunami.incois.gov.in/TEWS/displaybulletinslatest.jsp?type=TSP&eventId=incois2021osin&aos=
exchange&currBullNo=1&latestBullNo=1
NOTE: THIS IS A RESTRICTED-ACCESS WEBSITE CONTAINING TECHNICAL DATA
FOR INDIAN OCEAN NATIONAL TSUNAMI WARNING CENTRES ONLY. IT IS NOT
FOR GENERAL PUBLIC ACCESS.
GENERAL PUBLIC INFORMATION FOR THIS EVENT IS AVAILABLE FROM:
INDIAN TSUNAMI EARLY WARNING CENTRE (ITEWC)
INDIAN NATIONAL CENTRE FOR OCEAN INFORMATION SERVICES (INCOIS)
ADDRESS:OCEAN VALLEY, PRAGATHI NAGAR (BO), NIZAMPET (SO),
HYDERABAD - 500 090, INDIA
PHONE: 91-40-23895011
FAX: 91-40-23895012
EMAIL: tsunami@incois.gov.in
WEB: https://tsunami.incois.gov.in/TEWS/TSP
END OF NOTIFICATION MESSAGE
---------------------------------------------------------------------

>

2021-07-29 06:25 message from NTWC

Key information extracted from original GTS message :
Evaluation

  • An earthquake with a preliminary magnitude of 8.1 occurred in the alaska peninsula at 0616 UTC on thursday JULY 29 2021
  • Based on the preliminary earthquake parameters widespread hazardous TSUNAMI waves are possible
Threat Forecast

  • Hazardous TSUNAMI waves from this earthquake are possible within the next three hours along some coasts of no areas covered by this message appear to be immediately threatened. however... the situation is still under investigation. this threat evaluation will be updated as soon as further information becomes available.

Original Message :

WEPA40 PHEB 290625
TSUPAC

TSUNAMI MESSAGE NUMBER 1
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
0624 UTC THU JUL 29 2021

...PTWC TSUNAMI THREAT MESSAGE...


**** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****

THIS MESSAGE IS ISSUED FOR INFORMATION ONLY IN SUPPORT OF THE
UNESCO/IOC PACIFIC TSUNAMI WARNING AND MITIGATION SYSTEM AND IS
MEANT FOR NATIONAL AUTHORITIES IN EACH COUNTRY OF THAT SYSTEM.

NATIONAL AUTHORITIES WILL DETERMINE THE APPROPRIATE LEVEL OF
ALERT FOR EACH COUNTRY AND MAY ISSUE ADDITIONAL OR MORE REFINED
INFORMATION.

**** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****


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

* MAGNITUDE 8.1
* ORIGIN TIME 0616 UTC JUL 29 2021
* COORDINATES 55.5 NORTH 157.9 WEST
* DEPTH 17 KM / 11 MILES
* LOCATION ALASKA PENINSULA


EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 8.1 OCCURRED IN
THE ALASKA PENINSULA AT 0616 UTC ON THURSDAY JULY 29 2021.

* BASED ON THE PRELIMINARY EARTHQUAKE PARAMETERS... WIDESPREAD
HAZARDOUS TSUNAMI WAVES ARE POSSIBLE.


TSUNAMI THREAT FORECAST
-----------------------

* HAZARDOUS TSUNAMI WAVES FROM THIS EARTHQUAKE ARE POSSIBLE
WITHIN THE NEXT THREE HOURS ALONG SOME COASTS OF

NO AREAS COVERED BY THIS MESSAGE APPEAR TO BE IMMEDIATELY
THREATENED. HOWEVER... THE SITUATION IS STILL UNDER
INVESTIGATION. THIS THREAT EVALUATION WILL BE UPDATED AS
SOON AS FURTHER INFORMATION BECOMES AVAILABLE.


RECOMMENDED ACTIONS
-------------------

* GOVERNMENT AGENCIES RESPONSIBLE FOR THREATENED COASTAL AREAS
SHOULD TAKE ACTION TO INFORM AND INSTRUCT ANY COASTAL
POPULATIONS AT RISK IN ACCORDANCE WITH THEIR OWN
EVALUATION... PROCEDURES AND THE LEVEL OF THREAT.

* PERSONS LOCATED IN THREATENED COASTAL AREAS SHOULD STAY ALERT
FOR INFORMATION AND FOLLOW INSTRUCTIONS FROM NATIONAL AND
LOCAL AUTHORITIES.


POTENTIAL IMPACTS
-----------------

* A TSUNAMI IS A SERIES OF WAVES. THE TIME BETWEEN WAVE CRESTS
CAN VARY FROM 5 MINUTES TO AN HOUR. THE HAZARD MAY PERSIST
FOR MANY HOURS OR LONGER AFTER THE INITIAL WAVE.

* IMPACTS CAN VARY SIGNIFICANTLY FROM ONE SECTION OF COAST TO
THE NEXT DUE TO LOCAL BATHYMETRY AND THE SHAPE AND ELEVATION
OF THE SHORELINE.

* IMPACTS CAN ALSO VARY DEPENDING UPON THE STATE OF THE TIDE AT
THE TIME OF THE MAXIMUM TSUNAMI WAVES.

* PERSONS CAUGHT IN THE WATER OF A TSUNAMI MAY DROWN... BE
CRUSHED BY DEBRIS IN THE WATER... OR BE SWEPT OUT TO SEA.


NEXT UPDATE AND ADDITIONAL INFORMATION
--------------------------------------

* THE NEXT MESSAGE WILL BE ISSUED IN ONE HOUR... OR SOONER IF
THE SITUATION WARRANTS.

* AUTHORITATIVE INFORMATION ABOUT THE EARTHQUAKE FROM THE U.S.
GEOLOGICAL SURVEY CAN BE FOUND ON THE INTERNET AT
EARTHQUAKE.USGS.GOV.

* FURTHER INFORMATION ABOUT THIS EVENT MAY BE FOUND AT
WWW.TSUNAMI.GOV.

* COASTAL REGIONS OF HAWAII... AMERICAN SAMOA... GUAM... AND
CNMI SHOULD REFER TO PACIFIC TSUNAMI WARNING CENTER MESSAGES
SPECIFICALLY FOR THOSE PLACES THAT CAN BE FOUND AT
WWW.TSUNAMI.GOV.

* COASTAL REGIONS OF CALIFORNIA... OREGON... WASHINGTON...
BRITISH COLUMBIA AND ALASKA SHOULD ONLY REFER TO U.S.
NATIONAL TSUNAMI WARNING CENTER MESSAGES THAT CAN BE FOUND
AT WWW.TSUNAMI.GOV.

$$

>

2021-07-29 06:22 message from NTWC


Original Message :

WEAK51 PAAQ 290621
TSUAK1

BULLETIN
Public Tsunami Message Number 1
NWS National Tsunami Warning Center Palmer AK
1021 PM AKDT Wed Jul 28 2021

...A TSUNAMI WARNING IS NOW IN EFFECT...


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


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


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 of the earthquake and changes may occur.

* Magnitude 8.1
* Origin Time 2216 AKDT Jul 28 2021
2316 PDT Jul 28 2021
0616 UTC Jul 29 2021
* Coordinates 55.5 North 157.9 West
* Depth 11 miles
* Location 60 miles SE of Chignik, Alaska
495 miles SW of Anchorage, Alaska


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 2255 AKDT Jul 28
Unalaska 2350 AKDT Jul 28
Kodiak 2355 AKDT Jul 28
Cold Bay 0010 AKDT Jul 29
Adak 0015 AKDT Jul 29
Seward 0020 AKDT Jul 29
Elfin Cove 0025 AKDT Jul 29
Sitka 0030 AKDT Jul 29
Yakutat 0030 AKDT Jul 29
Valdez 0040 AKDT Jul 29
Cordova 0050 AKDT Jul 29
Homer 0100 AKDT Jul 29
Saint Paul 0110 AKDT Jul 29


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


RECOMMENDED ACTIONS
-------------------
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.

* 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.

$$

>