Overall Green Earthquake alert in Tonga Islands on 28 Nov 2022 09:30 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve alerts, information exchange and coordination in the first phase after major sudden-onset disasters.

M 5.4 in Tonga Islands on 28 Nov 2022 09:30 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:	5.4M
Depth:	43.61 Km
Lat/Lon:	-21.3843 , -173.8365
Event Date:	28 Nov 2022 09:30 UTC 27 Nov 2022 21:30 Local
Exposed Population:	Few people affected in MMI&>=III
Source:	NEIC us7000iswu
Inserted at:	28 Nov 2022 09:51 UTC
INFORM Coping capacity of the alert score:	1.1 ()

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Shakemap)		GDACS score
NEIC	0		0
us7000iswu	Scaled population (raster)	0
	C1 shakemap	0
	C2 shakemap	0
	Country Vulnerability	0
	INFORM_normalised	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	Alert	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1475695		0	28 Nov 2022 09:30	5.4M, 43.61km	3.59	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

The earthquake happened in Tonga ,of Tonga (population 30,109) . 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	1475695	-173.836/-21.384	5.4	43.6	3.646	28 Nov 2022 09:55	00:25	(new episode)
2	1475695	-173.836/-21.384	5.4	43.6	3.592	28 Nov 2022 10:03	00:32	(upd of #1)
3	1475695	-173.836/-21.384	5.4	43.6	3.592	28 Nov 2022 11:34	02:04	(upd of #2)
4	1475695	-173.836/-21.384	5.4	43.6	3.592	29 Nov 2022 09:40	1d 00:09	(upd of #3)

Affected Provinces

Intensity	Region Province	Country	Population
	Tonga	Tonga	30000 people

Affected populated places. Areas of interest

Name	Country	City class	Population	Distance
Ohonua	Tonga	Village	1200 people	115 km
Niutoua	Tonga	Village	-	128 km
Kolonga	Tonga	Village	-	132 km
Fatumu	Tonga	Village	-	134 km
Mua	Tonga	Village	-	135 km
Fuaamotu	Tonga	Village	-	136 km
Nuku'alofa	Tonga	Capital	24000 people	146 km
Houma	Tonga	Village	-	154 km
Nukunuku	Tonga	Village	-	154 km
Foui	Tonga	Village	-	159 km

see full list

Critical infrastructure

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

Airports

Intensity	Name	IATA Code	Elevation (m)	Usage	Runway type	IFR	Runway Length (ft)	Distance
	Eua Kaufana	EUA	unknown				0	116 km
	Fua'amotu International	TBU	38	Civ.	Paved	Yes	8700	136 km

Ports

Intensity	Name	LOCODE	Country	Distance
	Eua Island		Tonga	111 km
	Nuku'alofa	TOTBU	Tonga	145 km

More information

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

Disclaimer
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