Overall Green Earthquake in Tonga on 23 Sep 2026 14:41 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 5.7 in Tonga on 23 Sep 2026 14:41 UTC

Hazard models

Rapid Impact

Shakemap

Tsunami

Event summary

This earthquake is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude:	5.7M
Depth:	10 Km
Lat/Lon:	-14.9369 , -175.1114
Event Date:	23 Sep 2026 14:41 UTC 23 Sep 2026 02:41 Local
Exposed Population:	1 thousand in MMI IV
Source:	NEIC us6000tx3m
Inserted at:	23 Sep 2026 15:01 UTC
INFORM Coping capacity of the alert score:	1.1 (Tonga)

GDACS Score

For more info on GDACS score click here.

	Earthquake (Shakemap)		GDACS score
NEIC	0		0
us6000tx3m	Scaled population (raster)	0
	C1 shakemap	0
	C2 shakemap	0
	Country Vulnerability	0
	INFORM_normalised	0
	Score no CC	0

Maximum expected impact using different data sources.

ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.

Episode Timeline

ID	Level	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1735624		0	23 Sep 2026 14:41	5.7M, 10km	3.75	N/A (in MMI>=VII)		00:20	NEIC

The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.

The episode that has the last updated information.

* The max MMI detected for sources having shakemaps;
** The population detected in MMI>=7 for episode with shakemap or in a 100km radius;
*** The tsunami max height.

Exposed population

Intensity	Population
	no people

Shakemaps Timeline

Shake id #	episodeid	Lat/Lon	Magnitude	Depth	Max MMI	Date shake (UTC)	Delay (hh:mm)
1	1735624	-175.111/-14.937	5.7	10	3.962	23 Sep 2026 15:05	00:24	(new episode)
2	1735624	-175.111/-14.937	5.7	10	3.962	23 Sep 2026 15:11	00:29	(upd of #1)
3	1735624	-175.111/-14.937	5.7	10	3.962	23 Sep 2026 16:47	02:06	(upd of #2)
4	1735624	-175.111/-14.937	5.7	10	3.962	25 Sep 2026 02:02	1d 11:21	(upd of #3)
5	1735624	-175.195/-14.802	5.7	10	3.88	06 Oct 2026 02:02	12d 11:21	(upd of #4)

Affected Provinces

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.

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