Overall Green Earthquake alert in New Caledonia on 20 May 2023 01:51 UTC

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 7.4 in New Caledonia on 20 May 2023 01:51 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:	7.4M
Depth:	45 Km
Lat/Lon:	-23.1 , 170.4
Event Date:	20 May 2023 01:51 UTC 20 May 2023 12:51 Local
Exposed Population:	Few people affected in MMI -
Source:	NTWC at00ruxp51
Inserted at:	20 May 2023 02:00 UTC
INFORM Coping capacity of the alert score	1.1 (New Caledonia)

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Rapid Impact)		Tsunami		GDACS score
NTWC	0		0.2		0.2
at00ruxp51	Scaled population (vector)	0	Max wave alert	0.22m
	C1 rapid impact	0	Max wave realtime	0.22m
	C2 rapid impact	0
	Country Vulnerability	0
	INFORM_normalised	0

Maximum expected impact using different data sources.

Episode Timeline

ID	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1506560	0.2	20 May 2023 01:51	7.4M, 44.7km	N/A	Few people (in 100km)	0.2m (at 00:54)	00:08	PTWC
1506561	0.2	20 May 2023 01:51	7.4M, 45km	5.14	Few people (in 100km)	0.2m (at 01:14)	00:09	NTWC
1506563	0.1	20 May 2023 01:51	7.1M, 35.981km	3.96	N/A (in MMI>=VII)	0.1m (at 00:52)	00:20	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 off shore.

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

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.

Disclaimer
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