Overall Green Earthquake in Tonga on 01 Jul 2026 21:13 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 01 Jul 2026 21:13 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:	259 Km
Lat/Lon:	-16.9457 , -174.8243
Event Date:	01 Jul 2026 21:13 UTC 01 Jul 2026 09:13 Local
Exposed Population:	10 thousand in MMI>=II
Source:	NEIC us6000t9hu
Inserted at:	01 Jul 2026 23:58 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
us6000t9hu	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
1715713		0	01 Jul 2026 21:13	5.7M, 265.9km	2.62	N/A (in MMI>=VII)		00:19	NEIC
1715727		0	01 Jul 2026 21:13	5.7M, 259km	2.72	N/A (in MMI>=VII)		02:44	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

The earthquake happened in Tonga ,of Tonga. The alertlevel for this event is GREEN

Intensity	Population
	no people

Shakemaps Timeline

Shake id #	episodeid	Lat/Lon	Magnitude	Depth	Max MMI	Date shake (UTC)	Delay (hh:mm)
1	1715713	-174.846/-16.895	5.7	265.9	2.845	01 Jul 2026 21:39	00:25	(new episode)
2	1715713	-174.846/-16.895	5.7	265.9	2.845	01 Jul 2026 23:40	02:26	(upd of #1)
3	1715727	-174.824/-16.946	5.7	259	2.872	02 Jul 2026 00:04	02:50	(new episode)
4	1715727	-174.824/-16.946	5.7	259	2.872	03 Jul 2026 02:02	1d 04:48	(upd of #3)
5	1715727	-174.821/-16.96	5.7	259	2.87	09 Jul 2026 02:01	7d 04:48	(upd of #4)

Affected Provinces

Intensity	Region Province	Country	Population
	Tonga	Tonga	no people

Affected populated places. Areas of interest

Intensity	Name	Region Province	Country	City class	Population	Distance
	Hihifo		Tonga	Village	<1000 people	157 km
	Falehau		Tonga	Village	-	161 km

see full list

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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