Overall Green Earthquake alert in South Sandwich Islands Region on 08 Oct 2025 03:50 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 South Sandwich Islands Region on 08 Oct 2025 03:50 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:	10 Km
Lat/Lon:	-57.8245 , -24.1577
Event Date:	08 Oct 2025 03:50 UTC 08 Oct 2025 01:50 Local
Exposed Population:
Source:	NEIC us6000rfjc
Inserted at:	08 Oct 2025 04:12 UTC
INFORM Coping capacity of the alert score:	1.1 ()

GDACS Score

For more info on GDACS score click here.

	Earthquake (Shakemap)		GDACS score
NEIC	0		0
us6000rfjc	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
1664811		0	08 Oct 2025 03:50	5.4M, 10km	5.73	N/A (in MMI>=VII)		00:21	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 South Georgia and the South Sandwich Islands ,of South Georgia & the South Sandwich Is.. 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	1664811	-24.158/-57.824	5.4	10	2.686	08 Oct 2025 04:18	00:27	(new episode)
2	1664811	-24.158/-57.824	5.4	10	2.686	08 Oct 2025 06:20	02:29	(upd of #1)
3	1664811	-24.158/-57.824	5.4	10	2.686	09 Oct 2025 14:01	1d 10:10	(upd of #2)

Affected Provinces

Intensity	Region Province	Country	Population
	South Georgia & the South Sandwich Is.	South Georgia and the South Sandwich Islands	no people

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.

Disclaimer
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