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

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0 0 0
us7000j5sc Scaled population (vector) 0 Max wave alert 0m  
  C1 shakemap 0 Max wave realtime 0m  
  C2 shakemap 0      
  Country Vulnerability 0      
  INFORM_normalised 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

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1484557 0 20 Jan 2023 11:23 5.8M, 165.3km 3.93 530 thousand (in 100km) 00:07 PTWC
1484558 0 20 Jan 2023 11:23 6.2M, 166.372km 4.47 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.

Exposed population

The earthquake happened in Guadeloupe ,of Martinique (population 374,574) . The alertlevel for this event is GREEN

Intensity Population
<1000 people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1484558 -62.156/16.131 6.2 166.4 4.164 20 Jan 2023 11:47 00:23 (new episode)
2 0 1484558 -62.156/16.131 6.2 166.4 4.454 20 Jan 2023 11:55 00:32 (upd of #1)
3 0 1484558 -62.156/16.131 6.2 166.4 4.454 20 Jan 2023 13:28 02:04 (upd of #2)
4 0 1484558 -62.156/16.131 6.2 166.4 4.467 21 Jan 2023 11:40 1d 00:16 (upd of #3)

Affected Provinces

Intensity Region Province Country Population
Guadeloupe Guadeloupe 290000 people
Montserrat Montserrat <1000 people
Dominica Dominica 2300 people
Antigua & Barbuda Antigua and Barbuda <1000 people
Martinique Martinique 2800 people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
Vernou Guadeloupe Village - 54 km
Plymouth Saint Anthony Montserrat Capital no people 61 km
Baie-Mahault Guadeloupe Village 30000 people 63 km
Pointe-à-Pitre Guadeloupe City - 68 km
Blanchet Guadeloupe Village - 79 km
Sainte-Anne Guadeloupe Village 23000 people 83 km
Moule Guadeloupe City - 90 km
Portsmouth Saint John Dominica Village 3600 people 97 km
Grande Anse Guadeloupe Village - 117 km
Sainte Pierre Martinique Village - 186 km

see full list


Critical infrastructure

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

Airports

Intensity Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Terre de Haut LSS unknown 0 68 km
Le Raizet PTP 11 Civ. Paved Yes 11400 69 km
Montserrat Blackburne MNI unknown 0 73 km
St. Francois SFC unknown 0 94 km

Ports

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
Saint Louis Guadeloupe 92 km
Portsmouth DMPOR Dominica 96 km

More information

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