Overall Green Earthquake alert in Tonga on 27 Dec 2021 11:34 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 5.4 in Tonga on 27 Dec 2021 11:34 UTC

Event summary

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

GDACS ID	EQ 1303625
Earthquake Magnitude:	5.4M
Depth:	10 Km
Lat/Lon:	-21.4432 , -173.9028
Event Date:	27 Dec 2021 11:34 UTC 26 Dec 2021 23:34 Local
Exposed Population:	No people affected in 100km
Inserted at:	27 Dec 2021 12:17 UTC
INFORM Coping capacity:	1.1 (Tonga)

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Shakemap)		GDACS score
NEIC	0		0
us6000gfli	Scaled population (raster)	0
	C1 shakemap	-0.59
	C2 shakemap	0.53
	Country Vulnerability	0
	INFORM_normalised	1

Maximum expected impact using different data sources.

Virtual OSOCC

Meteo assessment

Satellite products

Analytical products

Detailed event map. European Union, 2025. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

Updates on volcanic activity (Smithsonian)

Latest media headlines

Terremoti: forti scosse nel Pacifico hanno messo alla prova la nuova r.. 12/29/2021 1:48:00 PM.

(a) Epicentri e meccanismi focali (MF) del terremoto di Raoul Island (stella e MF rossi) e dei due terremoti precedenti (stelle e MF verdi); i triangoli gialli indicano le posizioni dei mareografi e dei DART utilizzati in questo studio. (b)

...(more)

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Estimated casualties (PAGER)

USGS estimates the number of casualties for each earthquake for the Prompt Assessment of Global Earthquakes for Response (PAGER) product.
The graph shows the current fatalities estimate.

Exposed population

Analytical products

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: EC-JRC (48), (3), NEIC (4), OCHA (1), INGV (1), WMO (1), USGS (5), INFORM (2),

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