M 5.6 in South Georgia and the South Sandwich Islands on 25 Jul 2018 19:45 UTC

Hazard models

EQ parameters
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: 5.6M
Depth: 120.83 Km
Lat/Lon: -56.0646 , -27.6479
Event Date: 25 Jul 2018 19:45 UTC
25 Jul 2018 17:45 Local
Exposed Population: No people within 100km
Source: NEIC us2000gdsq
Inserted at: 26 Jul 2018 06:05 UTC
INFORM Coping capacity of the alert score: 1.1 (South Georgia & the South Sandwich Is.)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 GDACS score
NEIC 0 0
us2000gdsq Scaled population (vector) 0  
  C1 shakemap -0.59  
  C2 shakemap 0.53  
  Country Vulnerability 0  
  INFORM_normalised 1  
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

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1221288 0 25 Jul 2018 19:45 5.7M, 114.3km 3.46 N/A (in MMI>=VII) 00:20 NEIC
1221312 0 25 Jul 2018 19:45 5.6M, 120.83km 3.46 N/A (in MMI>=VII) 10:20 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 unknowed a zone. The alertlevel for this event is GREEN

Intensity Population
no people
no people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1221288 -56.074/-27.735 5.7 114.3 3.56 25 Jul 2018 20:09 00:24 (new episode)
2 0 1221288 -56.074/-27.735 5.7 114.3 3.56 25 Jul 2018 21:55 02:10 (upd of #1)
3 0 1221288 -56.065/-27.648 5.6 120.83 3.46 25 Jul 2018 23:02 03:17 (upd of #2)
4 0 1221312 -56.065/-27.648 5.6 120.83 3.46 26 Jul 2018 06:05 10:20 (new episode)

Affected Provinces



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.