Overall Green Earthquake alert in Tonga on 18 Aug 2025 07:48 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 5.5 in Tonga on 18 Aug 2025 07:48 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 1496350
Earthquake Magnitude:	5.5M
Depth:	10 Km
Lat/Lon:	-15.2858 , -173.3441
Event Date:	18 Aug 2025 07:48 UTC 17 Aug 2025 19:48 Local
Exposed Population:	110 thousand in MMI&>=III
Inserted at:	18 Aug 2025 08:08 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
us6000r1uh	Scaled population (raster)	0
	C1 shakemap	0
	C2 shakemap	0
	Country Vulnerability	0
	INFORM_normalised	0

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

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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 (5), OCHA (1), INGV (1), WMO (1), USGS (5), INFORM (2),

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