Overall Green Earthquake alert in Antigua and Barbuda from 20 Jan 2023 11:23 UTC to 11:23

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve alerts, information exchange and coordination in the first phase after major sudden-onset disasters.

M 5.8 in Antigua and Barbuda from 20 Jan 2023 11:23 UTC to 11:23

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:	5.8M
Depth:	165.3 Km
Lat/Lon:	16.239 , -62.015
Event Date:	20 Jan 2023 11:23 UTC 20 Jan 2023 07:23 Local
Exposed Population:	530 thousand in MMI IV
Source:	PTWC pt23020000
Inserted at:	20 Jan 2023 11:31 UTC

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Rapid Impact)		GDACS score
PTWC	0		0
pt23020000	Scaled population (vector)	0
	C1 rapid impact	0
	C2 rapid impact	0
	Country Vulnerability	0
	INFORM_normalised	0

Maximum expected impact using different data sources.

Episode Timeline

ID	Alert	Score	Date	Mag, Depth	MMI*	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 Guadeloupe (population 3,442) . The nearest places are La Pointe-Noire, Bas Vent, Bouillante, Cadet, Vernou, Basse-Terre, Saint-Claude, Baie-Mahault, Pointe-à-Pitre, Capesterre, and Saint John's.

Radius	Population
100 km	480000 people
75 km	390000 people
50 km	180000 people
20 km	no people
10 km	no people
5 km	no people
2 km	no people

Affected Provinces

Region Province	Country	Population
Guadeloupe	Guadeloupe	3400 people

Affected populated places

Name	Region Province	Country	City class	Population	Distance
La Pointe-Noire		Guadeloupe	Village	-	25 km
Bas Vent		Guadeloupe	Village	-	29 km
Bouillante		Guadeloupe	Village	7400 people	29 km
Cadet		Guadeloupe	Village	-	36 km
Vernou		Guadeloupe	Village	-	39 km
Basse-Terre		Guadeloupe	Capital	11000 people	41 km
Saint-Claude		Guadeloupe	City	10000 people	41 km
Baie-Mahault		Guadeloupe	Village	30000 people	46 km
Pointe-à-Pitre		Guadeloupe	City	-	52 km
Capesterre		Guadeloupe	City	-	53 km
Plymouth	Saint Anthony	Montserrat	Capital	no people	53 km
Long Ground		Montserrat	Village	no people	54 km
Bramble Village		Montserrat	Village	no people	55 km
Tuitts		Montserrat	Village	no people	56 km
Port-Louis		Guadeloupe	Village	5500 people	56 km
Bethnal		Montserrat	Village	no people	56 km
Weekes		Montserrat	Village	-	57 km
Molyneaux		Montserrat	Village	no people	57 km
Elberton		Montserrat	Village	no people	58 km
Windy Hill		Montserrat	Village	-	58 km
Firth		Montserrat	Village	-	59 km
Le Bourg		Guadeloupe	Village	-	59 km
Salem		Montserrat	Village	<1000 people	60 km
Old Town		Montserrat	Village	-	60 km
Woodlands		Montserrat	Village	-	60 km
Olveston		Montserrat	Village	-	61 km
Blanchet		Guadeloupe	Village	-	61 km
Blakes		Montserrat	Village	-	62 km
Cud Joe Head		Montserrat	Village	-	62 km
Saint John's		Montserrat	Village	-	63 km
Lookout		Montserrat	Village	-	63 km
Saint Peter's	Saint Peter	Montserrat	Village	-	63 km
Davy Hill		Montserrat	Village	-	63 km
Saint-Jacques		Guadeloupe	Village	-	65 km
Sainte-Anne		Guadeloupe	Village	23000 people	67 km
Saint John's		Antigua and Barbuda	Capital	22000 people	99 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	29 km
Le Raizet	PTP	11	Civ.	Paved	Yes	11400	52 km
W H Bramble (Abandoned)		12				0	59 km
Terre-de-Bas	HTB	unknown				0	59 km
Terre de Haut	LSS	unknown				0	62 km
Montserrat Blackburne	MNI	unknown				0	64 km
St. Francois	SFC	unknown				0	78 km
Marie Galante	GBJ	5	Civ.	Paved	Yes	4000	90 km

Ports

Name	LOCODE	Country	Distance
Basse Terre	GPBBR	Guadeloupe	41 km
Pointe-a-Pitre	GPPTP	Guadeloupe	51 km
Port Louis		Guadeloupe	55 km
Plymouth		Montserrat	56 km
Bourg Des Saintes		Guadeloupe	62 km
Saint Louis		Guadeloupe	81 km
Grand Bourg		Guadeloupe	84 km
Portsmouth	DMPOR	Dominica	94 km
Saint Johns	AGSJO	Antigua and Barbuda	99 km

More information

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

Disclaimer
While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information.
The JRC is not responsible for any damage or loss resulting from the use of the information presented on this website.
The designations employed and the presentation of material on the map do not imply the expression of any opinion whatsoever on the part of the European Union concerning the legal status of any country, territory or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.