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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

BRITISH COLUMBIA AND ALASKA SHOULD ONLY REFER TO U.S.
NATIONAL TSUNAMI WARNING CENTER MESSAGES THAT CAN BE FOUND
AT WWW.TSUNAMI.GOV.

Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

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...

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

* 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

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

* 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
---

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

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.

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

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

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

THE NEAREST SEA LEVEL GAUGES TO CONFIRM THIS FORECAST.

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

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

TSUNAMI WAVES ARE POSSIBLE FOR COASTS LOCATED WITHIN 1000 KM
OF THE EARTHQUAKE EPICENTER.

TSUNAMI THREAT FORECAST...UPDATED
---

* THE TSUNAMI FORECAST INDICATES NO TSUNAMI AMPLITUDES
ABOVE 0.3 METERS FOR ANY COAST. WE WILL CONTINUE TO MONITOR

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

otentially destructive teletsunamis generated anywhere in the Pacific Basin.

EVALUATION
---

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.6 OCCURRED IN
THE DRAKE PASSAGE AT 2029 UTC ON FRIDAY OCTOBER 10 2025.

* BASED ON THE PRELIMINARY EARTHQUAKE PARAMETERS... HAZARDOUS

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

#Earthquake
M7.6 earthquake DRAKE PASSAGE 13:29PDT Oct 10 Depth 14km: Tsunami possible

Tsunami Warning, Watch, and/or Advisory Bulletin issued by Pacific Tsunami Warning Center (PTWC) to its US and international AOR for confirmed or p...

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

EARTHQUAKE.USGS.GOV.

Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

ATLANTIC COASTS WILL BE ISSUED BY THE US NATIONAL TSUNAMI
WARNING CENTER AND CAN BE FOUND ON THE INTERNET AT
WWW.TSUNAMI.GOV.

* AUTHORITATIVE INFORMATION ABOUT THE EARTHQUAKE CAN BE
OBTAINED FROM THE CORRESPONDING REGIONAL SEISMIC NETWORK OR
THE U.S. GEOLOGICAL SURVEY ON THE INTERNET AT

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

ADDITIONAL DATA ARE RECEIVED OR THE SITUATION CHANGES.

* FURTHER INFORMATION ABOUT THIS EVENT AND ANY TSUNAMI THREAT
TO PUERTO RICO AND THE VIRGIN ISLANDS MAY BE FOUND ON THE
INTERNET AT WWW.TSUNAMI.GOV.

* INFORMATION REGARDING ANY TSUNAMI THREAT TO US GULF OR

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

* DEPTH 9 MILES / 14 KM
* LOCATION DRAKE PASSAGE

RECOMMENDED ACTIONS
---

* NO ACTION IS REQUIRED.

IMPACTS
---

* NO TSUNAMI IMPACTS ARE EXPECTED.

NEXT UPDATE AND ADDITIONAL INFORMATION
---

* THIS WILL BE THE ONLY STATEMENT ISSUED FOR THIS EVENT UNLESS

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

VIRGIN ISLANDS FROM THIS EARTHQUAKE.

PRELIMINARY EARTHQUAKE PARAMETERS
---

* THE FOLLOWING PARAMETERS ARE BASED ON A PRELIMINARY RAPID
ASSESSMENT OF THE EARTHQUAKE AND CHANGES MAY OCCUR.

* MAGNITUDE 7.8
* ORIGIN TIME 429 PM AST OCT 10 2025
* COORDINATES 60.3 SOUTH 61.9 WEST

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

EVALUATION
---

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.8 OCCURRED IN
THE DRAKE PASSAGE AT 429 PM AST ON FRIDAY OCTOBER 10 2025.

* BASED ON ALL AVAILABLE DATA... THERE IS NO TSUNAMI THREAT TO
PUERTO RICO... THE U.S. VIRGIN ISLANDS... OR THE BRITISH

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

#Earthquake
M7.8 earthquake DRAKE PASSAGE 13:29PDT Oct 10 Depth 14km: Tsunami NOT expected

Tsunami Info Bulletin for large earthquakes in the Gulf of Mexico, Caribbean and Atlantic areas of which magnitudes could affect the San Juan and Caribbean areas.

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

NATIONAL TSUNAMI WARNING CENTER MESSAGES THAT CAN BE FOUND
AT WWW.TSUNAMI.GOV.

Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

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.

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

* 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

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

* 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.

1

Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

* 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.

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

PUNTA ARENAS CHILE 53.2S 70.9W 0932 10/11

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.

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

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)
---
PUERTO WILLIAMS CHILE 54.9S 67.6W 0024 10/11

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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center @tsunamialertsptwc.bsky.social · 4d

FOR INFORMATION AND FOLLOW INSTRUCTIONS FROM NATIONAL AND
LOCAL AUTHORITIES.

REVISED ESTIMATED TIMES OF ARRIVAL
---

* ESTIMATED TIMES OF ARRIVAL -ETA- OF THE INITIAL TSUNAMI WAVE
FOR PLACES WITH A POTENTIAL TSUNAMI THREAT. ACTUAL ARRIVAL

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