Overall Orange Earthquake in Russia on 18 Sep 2025 18:58 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve awareness, information exchange and coordination in the first phase after major sudden-onset disasters.

M 7.8 Earthquake and Tsunami (1.9 m) in Russia on 18 Sep 2025 18:58 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.

Click on the messages list to visualize on the right the detailed text.

Measurements Levels

SOURCE	GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)
PTWC	Amchitka Ak	51.4	179.3	21: 25	0.04	14
PTWC	Dart 21414	49	178.2	20: 46	0.05	10
PTWC	Dart 21415	50.2	171.9	20: 10	0.06	08

18/09 21:38 WEPA40PHEB182137

18/09 20:42 WEHW42PHEB182041

18/09 20:32 WEHW42PHEB182031

18/09 20:31 WEPA40PHEB182030

18/09 20:10 WEAK51PAAQ182008

18/09 19:43 WEPA40RJTD181943

18/09 19:33 WEPA40RJTD181933

18/09 19:32 WEHW42PHEB181931

18/09 19:31 WEPA40PHEB181930

18/09 19:22 WEPA40RJTD181922

18/09 19:13 WEIO22WIIX181911

18/09 19:11 WEIO20DEMS181909

18/09 19:09 WEGM42PHEB181906

18/09 19:09 WEIO24AMMC181907

18/09 19:08 WEZS42PHEB181906

18/09 19:08 WEAK51PAAQ181907

18/09 19:06 WEHW42PHEB181906

18/09 19:06 WEPA40PHEB181905

2025-09-18 21:38 message from NTWC link

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 7.8 occurred off the east coast of kamchatka RUSSIA at 1858 UTC on thursday SEPTEMBER 18 2025
Based on all available data the TSUNAMI threat from this earthquake has now passed

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 LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)
Amchitka Ak	51.4	179.3	21: 25	0.04	14
Dart 21414	49	178.2	20: 46	0.05	10
Dart 21415	50.2	171.9	20: 10	0.06	08

Original Message :

WEPA40 PHEB 182137
TSUPAC

TSUNAMI MESSAGE NUMBER 4
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
2137 UTC THU SEP 18 2025

...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 UPDATED IN THIS MESSAGE.

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

* MAGNITUDE 7.8
* ORIGIN TIME 1858 UTC SEP 18 2025
* COORDINATES 53.0 NORTH 160.8 EAST
* DEPTH 10 KM / 6 MILES
* LOCATION OFF THE EAST COAST OF KAMCHATKA RUSSIA

EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.8 OCCURRED
OFF THE EAST COAST OF KAMCHATKA, RUSSIA AT 1858 UTC ON
THURSDAY SEPTEMBER 18 2025.

* BASED ON ALL AVAILABLE DATA... THE TSUNAMI THREAT FROM THIS
EARTHQUAKE HAS NOW PASSED.

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

* THERE IS NO LONGER A TSUNAMI THREAT FROM THIS EARTHQUAKE.

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
NEAR THE EARTHQUAKE OVER THE NEXT FEW HOURS.

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 TIME OF MAXIMUM WAVE
COORDINATES MEASURE TSUNAMI PERIOD
GAUGE LOCATION LAT LON (UTC) HEIGHT (MIN)
-------------------------------------------------------------
AMCHITKA AK 51.4N 179.3E 2125 0.04M/ 0.1FT 14
DART 21414 49.0N 178.2E 2046 0.05M/ 0.2FT 10
DART 21415 50.2N 171.9E 2010 0.06M/ 0.2FT 08

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.

$$

2025-09-18 20:42 message from NTWC link

Key information extracted from original GTS message :

Evaluation

Based on all available data a destructive pacific-wide TSUNAMI is not expected and there is no TSUNAMI threat to hawaii
Repeat
A destructive pacific-wide TSUNAMI is not expected and there is no TSUNAMI threat to hawaii
This will be the final statement issued for this event unless additional data are received

Original Message :

WEHW42 PHEB 182041
TIBHWX

HIZ001-003-006>007-009-016>018-023-026-029>035-037>050-051>054-
182241-

TSUNAMI INFORMATION STATEMENT NUMBER 4
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
1041 AM HST THU SEP 18 2025

TO - EMERGENCY MANAGEMENT IN THE STATE OF HAWAII

SUBJECT - TSUNAMI INFORMATION STATEMENT

THIS STATEMENT IS FOR INFORMATION ONLY. NO ACTION REQUIRED.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

ORIGIN TIME - 0858 AM HST 18 SEP 2025
COORDINATES - 53.0 NORTH 160.8 EAST
LOCATION - OFF THE EAST COAST OF KAMCHATKA RUSSIA
MAGNITUDE - 7.8 MOMENT

EVALUATION

BASED ON ALL AVAILABLE DATA A DESTRUCTIVE PACIFIC-WIDE TSUNAMI IS
NOT EXPECTED AND THERE IS NO TSUNAMI THREAT TO HAWAII. REPEAT. A
DESTRUCTIVE PACIFIC-WIDE TSUNAMI IS NOT EXPECTED AND THERE IS NO
TSUNAMI THREAT TO HAWAII.

THIS WILL BE THE FINAL STATEMENT ISSUED FOR THIS EVENT UNLESS
ADDITIONAL DATA ARE RECEIVED.

$$

2025-09-18 20:32 message from NTWC link

Key information extracted from original GTS message :

Evaluation

A TSUNAMI threat exists for parts of the pacific located closer to the earthquake
But it is still too early to determine whether there is a possible TSUNAMI threat to hawaii
If there is a TSUNAMI threat to hawaii the earliest estimated time the hazard might begin is 0251 pm hst thu 18 sep 2025 further statements will be issued hourly or sooner as the situation develops

Original Message :

WEHW42 PHEB 182031
TIBHWX

HIZ001-003-006>007-009-016>018-023-026-029>035-037>050-051>054-
182231-

TSUNAMI INFORMATION STATEMENT NUMBER 3
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
1031 AM HST THU SEP 18 2025

TO - EMERGENCY MANAGEMENT IN THE STATE OF HAWAII

SUBJECT - TSUNAMI INFORMATION STATEMENT

THIS STATEMENT IS FOR INFORMATION ONLY. NO ACTION IS REQUIRED AT
THIS TIME.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

ORIGIN TIME - 0858 AM HST 18 SEP 2025
COORDINATES - 53.0 NORTH 160.8 EAST
LOCATION - OFF THE EAST COAST OF KAMCHATKA RUSSIA
MAGNITUDE - 7.8 MOMENT

EVALUATION

A TSUNAMI THREAT EXISTS FOR PARTS OF THE PACIFIC LOCATED CLOSER
TO THE EARTHQUAKE. BUT IT IS STILL TOO EARLY TO DETERMINE WHETHER
THERE IS A POSSIBLE TSUNAMI THREAT TO HAWAII.

IF THERE IS A TSUNAMI THREAT TO HAWAII... THE EARLIEST ESTIMATED
TIME THE HAZARD MIGHT BEGIN IS

0251 PM HST THU 18 SEP 2025

FURTHER STATEMENTS WILL BE ISSUED HOURLY OR SOONER AS THE
SITUATION DEVELOPS.

$$

2025-09-18 20:31 message from NTWC link

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 7.8 occurred off the east coast of kamchatka RUSSIA at 1858 UTC on thursday SEPTEMBER 18 2025
TSUNAMI waves have been observed
Based on all available data hazardous TSUNAMI waves are forecast for some coasts

Threat Forecast

TSUNAMI waves reaching 1 to 3 meters above the tide level are possible along some coasts of russia.
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.

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 LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)
Dart 21415	50.2	171.9	20: 10	0.06	08

Original Message :

WEPA40 PHEB 182030
TSUPAC

TSUNAMI MESSAGE NUMBER 3
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
2028 UTC THU SEP 18 2025

...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 UNCHANGED IN THIS MESSAGE.

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

* MAGNITUDE 7.8
* ORIGIN TIME 1858 UTC SEP 18 2025
* COORDINATES 53.0 NORTH 160.8 EAST
* DEPTH 10 KM / 6 MILES
* LOCATION OFF THE EAST COAST OF KAMCHATKA RUSSIA

EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.8 OCCURRED
OFF THE EAST COAST OF KAMCHATKA, RUSSIA AT 1858 UTC ON
THURSDAY SEPTEMBER 18 2025.

* TSUNAMI WAVES HAVE BEEN OBSERVED.

* BASED ON ALL AVAILABLE DATA... HAZARDOUS TSUNAMI WAVES ARE
FORECAST FOR SOME COASTS.

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

* TSUNAMI WAVES REACHING 1 TO 3 METERS ABOVE THE TIDE LEVEL ARE
POSSIBLE ALONG SOME COASTS OF

RUSSIA.

* 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.

ESTIMATED TIMES OF ARRIVAL
--------------------------

* ESTIMATED TIMES OF ARRIVAL -ETA- OF THE INITIAL TSUNAMI WAVE
FOR PLACES WITHIN THREATENED REGIONS ARE GIVEN BELOW. ACTUAL
ARRIVAL TIMES MAY DIFFER AND THE INITIAL WAVE MAY NOT BE THE
LARGEST. A TSUNAMI IS A SERIES OF WAVES AND THE TIME BETWEEN
WAVES CAN BE FIVE MINUTES TO ONE HOUR.

LOCATION REGION COORDINATES ETA(UTC)
------------------------------------------------------------
PETROPAVLOVSK RUSSIA 53.2N 159.6E 1930 09/18
UST KAMCHATSK RUSSIA 56.1N 162.6E 1938 09/18
MEDNNY ISLAND RUSSIA 54.7N 167.4E 2002 09/18
OSTROV KARAGINS RUSSIA 58.8N 164.5E 2006 09/18
NAWILIWILI HAWAII 22.0N 159.4W 0051 09/19
HONOLULU HAWAII 21.3N 157.9W 0105 09/19
KAHULUI HAWAII 20.9N 156.5W 0111 09/19
HILO HAWAII 19.7N 155.1W 0129 09/19

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.

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 TIME OF MAXIMUM WAVE
COORDINATES MEASURE TSUNAMI PERIOD
GAUGE LOCATION LAT LON (UTC) HEIGHT (MIN)
-------------------------------------------------------------
DART 21415 50.2N 171.9E 2010 0.06M/ 0.2FT 08

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.

$$

2025-09-18 20:10 message from NTWC link

Original Message :

WEAK51 PAAQ 182008
TSUAK1

BULLETIN
Public Tsunami Message Number 2
NWS National Tsunami Warning Center Palmer AK
108 PM PDT Thu Sep 18 2025

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

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

Tsunami Advisory in Effect for;

* ALEUTIAN ISLANDS, Amchitka Pass, Alaska (125 miles W of
Adak) to Attu, Alaska

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

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

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

* Magnitude 7.8
* Origin Time 1058 AKDT Sep 18 2025
1158 PDT Sep 18 2025
1858 UTC Sep 18 2025
* Coordinates 53.1 North 160.5 East
* Depth 6 miles
* Location 260 miles SW of Bering I., Komandorski
75 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 1225 AKDT Sep 18

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.

$$

2025-09-18 19:43 message from JMA link

Key information extracted from original GTS message :

Evaluation

There is a possibility of a destructive regional TSUNAMI

Original Message :

WEPA40 RJTD 181943
TSUNAMI BULLETIN NUMBER 002
ISSUED BY NWPTAC(JMA)
ISSUED AT 1943Z 18 SEP 2025
PART 01 OF 01 PARTS

HYPOCENTRAL PARAMETERS (REVISION)
ORIGIN TIME:1858Z 18 SEP 2025
PRELIMINARY EPICENTER:LAT53.0NORTH LON160.8EAST
NEAR EAST COAST OF KAMCHATKA
JAPAN - KURIL ISLANDS - KAMCHATKA PENINSULA
MAG:7.7 (MW)

EVALUATION
THERE IS A POSSIBILITY OF A DESTRUCTIVE REGIONAL TSUNAMI

THIS BULLETIN IS FOR
EAST COASTS OF KAMCHATKA PENINSULA

ESTIMATED TSUNAMI ARRIVAL TIMES AND WAVE AMPLITUDES
EAST COASTS OF KAMCHATKA PENINSULA
LOCATION COORDINATES ARRIVAL TIME AMPL
PETROPAVLOVSK_K 53.2N 159.6E 1916Z 18 SEP 5-10M (REVISION)
NIKOLSKOYA 55.1N 165.7E 1926Z 18 SEP 0.3-1M (REVISION)

AMPL - MAXIMUM AMPLITUDE IN METERS FROM THE
UNDISTURBED SEA LEVEL TO THE CREST

IN SOME COASTAL AREAS (PARTICULARLY NEAR THE EPICENTER),
TSUNAMI WAVES MAY BE HIGHER AND/OR ARRIVE EARLIER THAN
ESTIMATED FOR NEARBY FORECAST POINTS.
AUTHORITIES SHOULD BE AWARE OF THIS POSSIBILITY.

THE EVALUATION OF TSUNAMIGENIC POTENTIAL AND ESTIMATED
ARRIVAL TIMES FOR TSUNAMI WAVES MAY ALSO DIFFER FROM
THOSE OF PTWC DUE TO DIFFERENCES IN ESTIMATED EARTHQUAKE
PARAMETERS AND THE TSUNAMI FORECAST MODEL.
AUTHORITIES SHOULD REFER TO EARLIER ARRIVAL TIMES
FOR GREATEST SAFETY.

THIS WILL BE THE FINAL BULLETIN UNLESS CHANGES IN THE POTENTIAL
FOR TSUNAMI GENERATION ARE DEEMED POSSIBLE BASED ON EARTHQUAKE
RE-EVALUATION OR REPORTS INDICATING TSUNAMI OBSERVATION ARE
RECEIVED.

=

2025-09-18 19:33 message from JMA link

Original Message :

WEPA40 RJTD 181933
TSUNAMI BULLETIN ISSUED BY JMA AT 1933Z 18 SEP

ORIGIN TIME 1858Z 18 SEP
PRELIMINARY EPICENTER LAT 53.0 N. LON 160.8 E.
NEAR KAMCHATKA
FOCAL DEPTH /// KM MAG 7.8

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

2025-09-18 19:32 message from NTWC link

Key information extracted from original GTS message :

Evaluation

A TSUNAMI threat exists for parts of the pacific located closer to the earthquake
But it is still too early to determine whether there is a possible TSUNAMI threat to hawaii
If there is a TSUNAMI threat to hawaii the earliest estimated time the hazard might begin is 0251 pm hst thu 18 sep 2025 further statements will be issued hourly or sooner as the situation develops

Original Message :

WEHW42 PHEB 181931
TIBHWX

HIZ001-003-006>007-009-016>018-023-026-029>035-037>050-051>054-
182131-

TSUNAMI INFORMATION STATEMENT NUMBER 2
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
931 AM HST THU SEP 18 2025

TO - EMERGENCY MANAGEMENT IN THE STATE OF HAWAII

SUBJECT - TSUNAMI INFORMATION STATEMENT

THIS STATEMENT IS FOR INFORMATION ONLY. NO ACTION IS REQUIRED AT
THIS TIME.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

ORIGIN TIME - 0858 AM HST 18 SEP 2025
COORDINATES - 53.0 NORTH 160.8 EAST
LOCATION - OFF THE EAST COAST OF KAMCHATKA RUSSIA
MAGNITUDE - 7.8 MOMENT

EVALUATION

A TSUNAMI THREAT EXISTS FOR PARTS OF THE PACIFIC LOCATED CLOSER
TO THE EARTHQUAKE. BUT IT IS STILL TOO EARLY TO DETERMINE WHETHER
THERE IS A POSSIBLE TSUNAMI THREAT TO HAWAII.

IF THERE IS A TSUNAMI THREAT TO HAWAII... THE EARLIEST ESTIMATED
TIME THE HAZARD MIGHT BEGIN IS

0251 PM HST THU 18 SEP 2025

FURTHER STATEMENTS WILL BE ISSUED HOURLY OR SOONER AS THE
SITUATION DEVELOPS.

$$

2025-09-18 19:31 message from NTWC link

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 7.8 occurred off the east coast of kamchatka RUSSIA at 1858 UTC on thursday SEPTEMBER 18 2025
Based on all available data hazardous TSUNAMI waves are forecast for some coasts

Original Message :

WEPA40 PHEB 181930
TSUPAC

TSUNAMI MESSAGE NUMBER 2
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
1929 UTC THU SEP 18 2025

...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.

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

* MAGNITUDE 7.8
* ORIGIN TIME 1858 UTC SEP 18 2025
* COORDINATES 53.0 NORTH 160.8 EAST
* DEPTH 10 KM / 6 MILES
* LOCATION OFF THE EAST COAST OF KAMCHATKA RUSSIA

EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.8 OCCURRED
OFF THE EAST COAST OF KAMCHATKA, RUSSIA AT 1858 UTC ON
THURSDAY SEPTEMBER 18 2025.

* BASED ON ALL AVAILABLE DATA... HAZARDOUS TSUNAMI WAVES ARE
FORECAST FOR SOME COASTS.

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

* TSUNAMI WAVES REACHING 1 TO 3 METERS ABOVE THE TIDE LEVEL ARE
POSSIBLE ALONG SOME COASTS OF

RUSSIA.

* 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.

ESTIMATED TIMES OF ARRIVAL
--------------------------

* ESTIMATED TIMES OF ARRIVAL -ETA- OF THE INITIAL TSUNAMI WAVE
FOR PLACES WITHIN THREATENED REGIONS ARE GIVEN BELOW. ACTUAL
ARRIVAL TIMES MAY DIFFER AND THE INITIAL WAVE MAY NOT BE THE
LARGEST. A TSUNAMI IS A SERIES OF WAVES AND THE TIME BETWEEN
WAVES CAN BE FIVE MINUTES TO ONE HOUR.

LOCATION REGION COORDINATES ETA(UTC)
------------------------------------------------------------
PETROPAVLOVSK RUSSIA 53.2N 159.6E 1930 09/18
UST KAMCHATSK RUSSIA 56.1N 162.6E 1938 09/18
MEDNNY ISLAND RUSSIA 54.7N 167.4E 2002 09/18
OSTROV KARAGINS RUSSIA 58.8N 164.5E 2006 09/18
NAWILIWILI HAWAII 22.0N 159.4W 0051 09/19
HONOLULU HAWAII 21.3N 157.9W 0105 09/19
KAHULUI HAWAII 20.9N 156.5W 0111 09/19
HILO HAWAII 19.7N 155.1W 0129 09/19

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.

$$

2025-09-18 19:22 message from JMA link

Key information extracted from original GTS message :

Evaluation

There is a possibility of a destructive regional TSUNAMI

Original Message :

WEPA40 RJTD 181922
TSUNAMI BULLETIN NUMBER 001
ISSUED BY NWPTAC(JMA)
ISSUED AT 1922Z 18 SEP 2025
PART 01 OF 01 PARTS

HYPOCENTRAL PARAMETERS
ORIGIN TIME:1858Z 18 SEP 2025
PRELIMINARY EPICENTER:LAT53.0NORTH LON160.8EAST
NEAR EAST COAST OF KAMCHATKA
JAPAN - KURIL ISLANDS - KAMCHATKA PENINSULA
MAG:7.8

EVALUATION
THERE IS A POSSIBILITY OF A DESTRUCTIVE REGIONAL TSUNAMI

THIS BULLETIN IS FOR
EAST COASTS OF KAMCHATKA PENINSULA

ESTIMATED TSUNAMI ARRIVAL TIMES AND WAVE AMPLITUDES
EAST COASTS OF KAMCHATKA PENINSULA
LOCATION COORDINATES ARRIVAL TIME AMPL
PETROPAVLOVSK_K 53.2N 159.6E 1922Z 18 SEP 3-5M
NIKOLSKOYA 55.1N 165.7E 1921Z 18 SEP 0.3-1M

AMPL - MAXIMUM AMPLITUDE IN METERS FROM THE
UNDISTURBED SEA LEVEL TO THE CREST

IN SOME COASTAL AREAS (PARTICULARLY NEAR THE EPICENTER),
TSUNAMI WAVES MAY BE HIGHER AND/OR ARRIVE EARLIER THAN
ESTIMATED FOR NEARBY FORECAST POINTS.
AUTHORITIES SHOULD BE AWARE OF THIS POSSIBILITY.

THE EVALUATION OF TSUNAMIGENIC POTENTIAL AND ESTIMATED
ARRIVAL TIMES FOR TSUNAMI WAVES MAY ALSO DIFFER FROM
THOSE OF PTWC DUE TO DIFFERENCES IN ESTIMATED EARTHQUAKE
PARAMETERS AND THE TSUNAMI FORECAST MODEL.
AUTHORITIES SHOULD REFER TO EARLIER ARRIVAL TIMES
FOR GREATEST SAFETY.

THIS WILL BE THE FINAL BULLETIN UNLESS CHANGES IN THE POTENTIAL
FOR TSUNAMI GENERATION ARE DEEMED POSSIBLE BASED ON EARTHQUAKE
RE-EVALUATION OR REPORTS INDICATING TSUNAMI OBSERVATION ARE
RECEIVED.

=

2025-09-18 19:13 link

Original Message :

WEIO22 WIIX 181911
TSP-InaTEWS-20250918-1911-001
--------------------------------------------------------------------------------
TSUNAMI BULLETIN NOTIFICATION MESSAGE NUMBER 1
IOTWMS TSUNAMI SERVICE PROVIDER INDONESIA (InaTEWS-BMKG)
issued at 1911 UTC, Sep 18, 2025
--------------------------------------------------------------------------------
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 : 7.5 Mwp
Depth : 81km
Date : 18 Sep 2025
Origin Time: 18:58:22 UTC
Latitude : 53.31N
Longitude : 160.39E
Location : Near East Coast of Kamchatka

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
--------------------------------------------------------------

2025-09-18 19:11 link

Original Message :

WEIO20 DEMS 181909
---------------------------------------------------------------------
TSUNAMI BULLETIN NOTIFICATION MESSAGE NUMBER 1
IOTWMS TSUNAMI SERVICE PROVIDER INDIA (ITEWC)
ISSUED AT 1909 UTC THURSDAY 18 SEPTEMBER 2025
---------------------------------------------------------------------
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 : 7.4
Depth : 10.0
Date : 18 Sep 2025
Origin Time : 1858 UTC
Latitude : 53.11 N
Longitude : 160.65 E
Location : Near East Coast of Kamchatka
TO VIEW THE BULLETIN GO TO THE IOTWMS-TSP INDIA WEBSITE AT:
https://tsunami.incois.gov.in/TEWS/displaybulletinslatest.jsp?type=TSP&eventId=incois2025simi&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
---------------------------------------------------------------------

2025-09-18 19:09 message from NTWC link

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 7.8 occurred off the east coast of kamchatka RUSSIA at 458 am chst on friday SEPTEMBER 19 2025
Based on all available data there is no TSUNAMI threat to guam rota tinian or saipan from this earthquake

Original Message :

WEGM42 PHEB 181906
TIBGUM

GUZ001>004-182106-

TSUNAMI INFORMATION STATEMENT NUMBER 1
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
506 AM CHST FRI SEP 19 2025

...NO TSUNAMI THREAT TO GUAM/CNMI FROM A DISTANT EARTHQUAKE...

AUDIENCE
--------
EMERGENCY MANAGERS... MEDIA... GENERAL PUBLIC

EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.8 OCCURRED
OFF THE EAST COAST OF KAMCHATKA, RUSSIA AT 458 AM CHST ON
FRIDAY SEPTEMBER 19 2025.

* BASED ON ALL AVAILABLE DATA... THERE IS NO TSUNAMI THREAT TO
GUAM... ROTA... TINIAN OR SAIPAN FROM THIS EARTHQUAKE.

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

* NO ACTION IS REQUIRED.

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

* NO TSUNAMI IMPACTS ARE EXPECTED.

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

* MAGNITUDE 7.8
* ORIGIN TIME 458 AM CHST SEP 19 2025
* COORDINATES 53.0 NORTH 160.8 EAST
* DEPTH 6 MILES
* LOCATION OFF THE EAST COAST OF KAMCHATKA RUSSIA

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

* THIS WILL BE THE ONLY STATEMENT ISSUED FOR THIS EVENT UNLESS
ADDITIONAL DATA ARE RECEIVED OR THE SITUATION CHANGES.

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

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

$$

2025-09-18 19:09 link

Original Message :

WEIO24 AMMC 181907
---------------------------------------------------------------------
TSUNAMI BULLETIN NOTIFICATION MESSAGE NUMBER 1
IOTWMS TSUNAMI SERVICE PROVIDER AUSTRALIA [JATWC]
ISSUED AT 1907 UTC THURSDAY 18 SEPTEMBER 2025
---------------------------------------------------------------------
TO: INDIAN OCEAN NATIONAL TSUNAMI WARNING CENTRES [NTWC]
FROM: IOTWMS-TSP AUSTRALIA

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

MAGNITUDE: 7.7 Mw[Mwp]
DEPTH: 46 km
DATE: 18 Sep 2025
ORIGIN TIME: 1858 UTC
LATITUDE: 53.10N
LONGITUDE: 160.68E
LOCATION: Near East Coast of Kamchatka

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

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

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:

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

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

2025-09-18 19:08 message from NTWC link

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 7.8 occurred off the east coast of kamchatka RUSSIA at 758 am sst on thursday SEPTEMBER 18 2025
Based on all available data there is no TSUNAMI threat to AMERICAN SAMOA from this earthquake

Original Message :

WEZS42 PHEB 181906
TIBPPG

ASZ001>004-182106-

TSUNAMI INFORMATION STATEMENT NUMBER 1
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
806 AM SST THU SEP 18 2025

...NO TSUNAMI THREAT FROM A DISTANT EARTHQUAKE...

AUDIENCE
--------
EMERGENCY MANAGERS... MEDIA... GENERAL PUBLIC

EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.8 OCCURRED
OFF THE EAST COAST OF KAMCHATKA, RUSSIA AT 758 AM SST ON
THURSDAY SEPTEMBER 18 2025.

* BASED ON ALL AVAILABLE DATA... THERE IS NO TSUNAMI THREAT TO
AMERICAN SAMOA FROM THIS EARTHQUAKE.

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

* NO ACTION IS REQUIRED.

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

* NO TSUNAMI IMPACTS ARE EXPECTED.

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

* MAGNITUDE 7.8
* ORIGIN TIME 758 AM SST SEP 18 2025
* COORDINATES 53.0 NORTH 160.8 EAST
* DEPTH 6 MILES
* LOCATION OFF THE EAST COAST OF KAMCHATKA RUSSIA

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

* THIS WILL BE THE ONLY STATEMENT ISSUED FOR THIS EVENT UNLESS
ADDITIONAL DATA ARE RECEIVED OR THE SITUATION CHANGES.

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

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

$$

2025-09-18 19:08 message from NTWC link

Original Message :

WEAK51 PAAQ 181907
TSUAK1

BULLETIN
Public Tsunami Message Number 1
NWS National Tsunami Warning Center Palmer AK
1207 PM PDT Thu Sep 18 2025

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

Tsunami Advisory in Effect for;

* ALEUTIAN ISLANDS, Amchitka Pass, Alaska (125 miles W of
Adak) to Attu, Alaska

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 7.8
* Origin Time 1058 AKDT Sep 18 2025
1158 PDT Sep 18 2025
1858 UTC Sep 18 2025
* Coordinates 53.0 North 160.8 East
* Depth 6 miles
* Location 255 miles SW of Bering I., Komandorski
90 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 1220 AKDT Sep 18

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.

$$

2025-09-18 19:06 message from NTWC link

Key information extracted from original GTS message :

Evaluation

A TSUNAMI threat exists for parts of the pacific located closer to the earthquake
But it is still too early to determine whether there is a possible TSUNAMI threat to hawaii
If there is a TSUNAMI threat to hawaii the earliest estimated time the hazard might begin is 0255 pm hst thu 18 sep 2025 further statements will be issued hourly or sooner as the situation develops

Original Message :

WEHW42 PHEB 181906
TIBHWX

HIZ001-003-006>007-009-016>018-023-026-029>035-037>050-051>054-
182106-

TSUNAMI INFORMATION STATEMENT NUMBER 1
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
906 AM HST THU SEP 18 2025

TO - EMERGENCY MANAGEMENT IN THE STATE OF HAWAII

SUBJECT - TSUNAMI INFORMATION STATEMENT

THIS STATEMENT IS FOR INFORMATION ONLY. NO ACTION IS REQUIRED AT
THIS TIME.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

ORIGIN TIME - 0858 AM HST 18 SEP 2025
COORDINATES - 53.0 NORTH 160.8 EAST
LOCATION - OFF THE EAST COAST OF KAMCHATKA RUSSIA
MAGNITUDE - 7.8 MOMENT

EVALUATION

A TSUNAMI THREAT EXISTS FOR PARTS OF THE PACIFIC LOCATED CLOSER
TO THE EARTHQUAKE. BUT IT IS STILL TOO EARLY TO DETERMINE WHETHER
THERE IS A POSSIBLE TSUNAMI THREAT TO HAWAII.

IF THERE IS A TSUNAMI THREAT TO HAWAII... THE EARLIEST ESTIMATED
TIME THE HAZARD MIGHT BEGIN IS

0255 PM HST THU 18 SEP 2025

FURTHER STATEMENTS WILL BE ISSUED HOURLY OR SOONER AS THE
SITUATION DEVELOPS.

$$

2025-09-18 19:06 message from NTWC link

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 7.8 occurred off the east coast of kamchatka RUSSIA at 1858 UTC on thursday SEPTEMBER 18 2025
Based on the preliminary earthquake parameters hazardous TSUNAMI waves are possible for coasts located within 1000 km of the earthquake epicenter

Threat Forecast

Hazardous TSUNAMI waves from this earthquake are possible within 1000 km of the epicenter along the coasts of russia.

Original Message :

WEPA40 PHEB 181905
TSUPAC

TSUNAMI MESSAGE NUMBER 1
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
1905 UTC THU SEP 18 2025

...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 7.8
* ORIGIN TIME 1858 UTC SEP 18 2025
* COORDINATES 53.0 NORTH 160.8 EAST
* DEPTH 10 KM / 6 MILES
* LOCATION OFF THE EAST COAST OF KAMCHATKA RUSSIA

EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.8 OCCURRED
OFF THE EAST COAST OF KAMCHATKA, RUSSIA AT 1858 UTC ON
THURSDAY SEPTEMBER 18 2025.

* BASED ON THE PRELIMINARY EARTHQUAKE PARAMETERS... HAZARDOUS
TSUNAMI WAVES ARE POSSIBLE FOR COASTS LOCATED WITHIN 1000 KM
OF THE EARTHQUAKE EPICENTER.

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

* HAZARDOUS TSUNAMI WAVES FROM THIS EARTHQUAKE ARE POSSIBLE
WITHIN 1000 KM OF THE EPICENTER ALONG THE COASTS OF

RUSSIA.

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.

ESTIMATED TIMES OF ARRIVAL
--------------------------

* ESTIMATED TIMES OF ARRIVAL -ETA- OF THE INITIAL TSUNAMI WAVE
FOR PLACES WITH A POTENTIAL TSUNAMI THREAT. ACTUAL ARRIVAL
TIMES MAY DIFFER AND THE INITIAL WAVE MAY NOT BE THE
LARGEST. A TSUNAMI IS A SERIES OF WAVES AND THE TIME BETWEEN
WAVES CAN BE FIVE MINUTES TO ONE HOUR.

LOCATION REGION COORDINATES ETA(UTC)
------------------------------------------------------------
PETROPAVLOVSK RUSSIA 53.2N 159.6E 1937 09/18
UST KAMCHATSK RUSSIA 56.1N 162.6E 1940 09/18
MEDNNY ISLAND RUSSIA 54.7N 167.4E 1955 09/18
OSTROV KARAGINS RUSSIA 58.8N 164.5E 2008 09/18
SEVERO KURILSK RUSSIA 50.8N 156.1E 2050 09/18
UST KAHYRYUZOVO RUSSIA 57.1N 156.7E 0043 09/19

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.

$$

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