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 7.1 in New Caledonia on 20 May 2023 01:51 UTC

2023-05-20 03:55 message from NTWC

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 7.1 occurred southeast of the loyalty ISLANDS at 0151 UTC on saturday MAY 20 2023
Based on all available data the TSUNAMI threat from this earthquake has now passed

Tsunami Observations

The following are tsunami wave observations from coastal and/or deep-ocean sea level gauges at the indicated locations the maximum tsunami height is measured with respect to the normal tide level

GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)
Thio New Caledonia	-21.6	166.2	03: 13	0.03	10
Ouinne New Caledon	-22	166.7	03: 03	0.14	08
Lifou New Caledoni	-20.9	167.3	03: 01	0.11	04
Mare New Caledonia	-21.5	167.9	02: 57	0.12	06

Measurements Levels

SOURCE	GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)
PTWC	Thio New Caledonia	-21.6	166.2	03: 13	0.03	10
PTWC	Ouinne New Caledon	-22	166.7	03: 03	0.14	08
PTWC	Lifou New Caledoni	-20.9	167.3	03: 01	0.11	04
PTWC	Mare New Caledonia	-21.5	167.9	02: 57	0.12	06

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