Overall Green Earthquake in Bonin Islands, Japan Region on 25 Oct 2026 02:09 UTC

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M 6.5 in Bonin Islands, Japan Region on 25 Oct 2026 02:09 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)

25/10 03:42 WEIO24AMMC250241

25/10 03:27 WEAK53PAAQ250226

25/10 03:20 WEPA40RJTD250220

25/10 03:15 WEPA40RJTD250215

2026-10-25 03:42 link

Original Message :

WEIO24 AMMC 250241
---------------------------------------------------------------------
TSUNAMI BULLETIN NOTIFICATION MESSAGE NUMBER 1
IOTWMS TSUNAMI SERVICE PROVIDER AUSTRALIA [JATWC]
ISSUED AT 0241 UTC SUNDAY 25 OCTOBER 2026
---------------------------------------------------------------------
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: 6.5 Mww
DEPTH: 489 km
DATE: 25 Oct 2026
ORIGIN TIME: 0209 UTC
LATITUDE: 27.79N
LONGITUDE: 139.63E
LOCATION: Bonin Islands, Japan Region

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

2026-10-25 03:27 message from NTWC link

Key information extracted from original GTS message :

Evaluation

There is no TSUNAMI danger for the u s west coast BRITISH columbia or alaska
Based on the depth of the earthquake a TSUNAMI is not expected
An earthquake has occurred with parameters listed below

Original Message :

WEAK53 PAAQ 250226
TIBAK1

Tsunami Information Statement Number 1
NWS National Tsunami Warning Center Palmer AK
726 PM PDT Sat Oct 24 2026

...THIS IS A TSUNAMI INFORMATION STATEMENT FOR ALASKA, BRITISH
COLUMBIA, WASHINGTON, OREGON AND CALIFORNIA...

EVALUATION
----------
* There is no tsunami danger for the U.S. West Coast, British
Columbia, or Alaska.

* Based on the depth of the earthquake, a tsunami is not
expected.

* An earthquake has occurred with parameters listed below.

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

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

* Magnitude 7.0
* Origin Time 1809 AKDT Oct 24 2026
1909 PDT Oct 24 2026
0209 UTC Oct 25 2026
* Coordinates 28.0 North 139.9 East
* Depth 294 miles
* Location in the Bonin Islands, Japan region

ADDITIONAL INFORMATION AND NEXT UPDATE
--------------------------------------
* Refer to the internet site tsunami.gov for more information.

* Pacific coastal regions outside California, Oregon, Washington,
British Columbia, and Alaska should refer to the Pacific Tsunami
Warning Center messages at tsunami.gov.

* This will be the only U.S. National Tsunami Warning Center
message issued for this event unless additional information
becomes available.

$$

2026-10-25 03:20 message from JMA link

Key information extracted from original GTS message :

Evaluation

There is no possibility of a TSUNAMI 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

Original Message :

WEPA40 RJTD 250220
TSUNAMI BULLETIN NUMBER 001
ISSUED BY NWPTAC(JMA)
ISSUED AT 0220Z 25 OCT 2026
PART 01 OF 01 PARTS

HYPOCENTRAL PARAMETERS
ORIGIN TIME:0209Z 25 OCT 2026
PRELIMINARY EPICENTER:LAT28.0NORTH LON139.9EAST
BONIN ISLANDS, JAPAN REGION
GUAM TO JAPAN
FOCAL DEPTH:473KM MAG:7.0 (MJMA)

EVALUATION
THERE IS NO POSSIBILITY OF A TSUNAMI

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.

=

2026-10-25 03:15 message from JMA link

Original Message :

WEPA40 RJTD 250215
TSUNAMI BULLETIN ISSUED BY JMA AT 0215Z 25 OCT

ORIGIN TIME 0209Z 25 OCT
PRELIMINARY EPICENTER LAT 28.0 N. LON 139.9 E.
OGASAWARA ISLANDS REGION
FOCAL DEPTH 473 KM MAG 7.0

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

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