Overall Green Earthquake in Tonga on 22 Mar 2026 22:26 UTC

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M 5.9 in Tonga on 22 Mar 2026 22:26 UTC

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Measurements Levels

SOURCE	GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)

22/03 22:37 WEZS42PHEB222234

2026-03-22 22:37 message from NTWC link

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 5.7 occurred about 104 miles SOUTH of upolu ISLAND at 1126 am sst on sunday MARCH 22 2026
Based on all available data there is no TSUNAMI threat to AMERICAN SAMOA from this earthquake
Some areas MAY have experienced strong shaking

Original Message :

WEZS42 PHEB 222234
TIBPPG

ASZ001>004-230034-

TSUNAMI INFORMATION STATEMENT NUMBER 1
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
1134 AM SST SUN MAR 22 2026

...NO TSUNAMI THREAT FROM A NEARBY EARTHQUAKE...

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

EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 5.7 OCCURRED
ABOUT 104 MILES SOUTH OF UPOLU ISLAND AT 1126 AM SST ON
SUNDAY MARCH 22 2026.

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

* SOME AREAS MAY HAVE EXPERIENCED STRONG SHAKING.

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

* NO ACTION IS REQUIRED.

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

* NO TSUNAMI IMPACTS ARE EXPECTED.

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

* MAGNITUDE 5.7
* ORIGIN TIME 1126 AM SST MAR 22 2026
* COORDINATES 15.4 SOUTH 172.4 WEST
* DEPTH 50 MILES
* LOCATION ABOUT 104 MILES SOUTH OF UPOLU ISLAND

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.

$$

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