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 -0.59 Max wave realtime 0m  
  C2 shakemap 0.53      
  Country Vulnerability 0      
  INFORM_normalised 1      
Maximum expected impact using different data sources.

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 off shore.

Radius Population
100 km 420000 people
75 km 310000 people
50 km 55000 people
20 km no people
10 km no people
5 km no people
2 km no people

Affected Provinces

Affected populated places

Name Region Province Country City class Population Distance
Bouillante Guadeloupe Village 7400 people 42 km
La Pointe-Noire Guadeloupe Village - 42 km
Bas Vent Guadeloupe Village - 47 km
Basse-Terre Guadeloupe Capital 11000 people 49 km
Saint-Claude Guadeloupe City 10000 people 50 km
Cadet Guadeloupe Village - 53 km
Vernou Guadeloupe Village - 54 km
Plymouth Saint Anthony Montserrat Capital no people 61 km
Baie-Mahault Guadeloupe Village 30000 people 63 km
Long Ground Montserrat Village no people 64 km
Capesterre Guadeloupe City - 64 km
Le Bourg Guadeloupe Village - 64 km
Bramble Village Montserrat Village no people 65 km
Weekes Montserrat Village - 65 km
Tuitts Montserrat Village no people 65 km
Elberton Montserrat Village no people 65 km
Bethnal Montserrat Village no people 66 km
Molyneaux Montserrat Village no people 66 km
Windy Hill Montserrat Village - 67 km
Firth Montserrat Village - 67 km
Salem Montserrat Village <1000 people 68 km
Pointe-à-Pitre Guadeloupe City - 68 km
Old Town Montserrat Village - 68 km
Woodlands Montserrat Village - 69 km
Olveston Montserrat Village - 69 km

see full list

Critical infrastructure

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

Airports

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
Marie Galante GBJ 5 Civ. Paved Yes 4000 99 km

Ports

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
Saint Louis Guadeloupe 92 km
Grand Bourg Guadeloupe 94 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.