M 6.2 in Antigua and Barbuda on 20 Jan 2023 11:23 UTC

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: 6.2M
Depth: 166.372 Km
Lat/Lon: 16.131 , -62.1564
Event Date: 20 Jan 2023 11:23 UTC
20 Jan 2023 07:23 Local
Exposed Population: 490 thousand in MMI IV
Source: NEIC us7000j5sc
Inserted at: 20 Jan 2023 11:43 UTC
INFORM Coping capacity of the alert score: 1.1 ()


For more info on GDACS alert score click here.
(Rapid Impact)
Tsunami GDACS score
NEIC 0 0 0
us7000j5sc Scaled population (raster) 0 Max wave alert 0m  
  C1 rapid impact 0 Max wave realtime 0m  
  C2 rapid impact 0      
  Country Vulnerability 0      
  INFORM_normalised 0      
Maximum expected impact using different data sources.

The green area correspond to areas affected by strong shaking (MMI VI or higher) according to the simulation.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1484557 0 20 Jan 2023 11:23 5.8M, 165.3km 3.93 N/A (in MMI>=VII) N/A 00:07 PTWC
1484558 0 20 Jan 2023 11:23 6.2M, 166.372km 4.2 N/A (in MMI>=VII) 0m (at 00:00) 00:19 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.

Rapid Impact

The results presented below are calculated with the ShakeMap open source software (USGS) using only earthquake hypocenter information to provide a rapid estimation of the ground motion and shaking intensity without taking into account any instrumental observations or earthquake source scaling laws.

Exposed population

The earthquake happened in Guadeloupe ,of Guadeloupe (population 365,815) . The alertlevel for this event is GREEN

Intensity Population
no people

Affected Provinces

Intensity Region Province Country Population
Guadeloupe Guadeloupe 370000 people
Montserrat Montserrat 5000 people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
La Pointe-Noire Guadeloupe Village - 42 km
Basse-Terre Guadeloupe Capital 11000 people 49 km
Saint-Claude Guadeloupe City 10000 people 50 km
Vernou Guadeloupe Village - 54 km
Plymouth Saint Anthony Montserrat Capital no people 61 km
Baie-Mahault Guadeloupe Village 30000 people 63 km
Capesterre Guadeloupe City - 64 km
Le Bourg Guadeloupe Village - 64 km
Pointe-à-Pitre Guadeloupe City - 68 km
Saint Peter's Saint Peter Montserrat Village - 71 km
Port-Louis Guadeloupe Village 5500 people 75 km
Blanchet Guadeloupe Village - 79 km
Sainte-Anne Guadeloupe Village 23000 people 83 km
Saint-Jacques Guadeloupe Village - 84 km
Moule Guadeloupe City - 90 km
Saint-Louis Guadeloupe Village - 94 km

see full list

Critical infrastructure

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


Intensity Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Basse-Terre Baillif BBR unknown 0 44 km
Terre-de-Bas HTB unknown 0 64 km
Terre de Haut LSS unknown 0 68 km
Le Raizet PTP 11 Civ. Paved Yes 11400 69 km
W H Bramble (Abandoned) 12 0 69 km
Montserrat Blackburne MNI unknown 0 73 km
St. Francois SFC unknown 0 94 km


Intensity Name LOCODE Country Distance
Basse Terre GPBBR Guadeloupe 48 km
Plymouth Montserrat 63 km
Pointe-a-Pitre GPPTP Guadeloupe 68 km
Bourg Des Saintes Guadeloupe 68 km
Port Louis Guadeloupe 74 km

More information

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