Overall Green Earthquake alert in New Caledonia on 19 May 2023 02:57 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 7.7 in New Caledonia on 19 May 2023 02:57 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:	7.7M
Depth:	37.748 Km
Event Date:	19 May 2023 02:57 UTC 19 May 2023 13:57 Local
Exposed Population:	Few people affected in MMI -
Source:	NEIC us6000kd0n
Inserted at:	19 May 2023 03:16 UTC
INFORM Coping capacity of the alert score:	1.1 (New Caledonia)
Maximun Wave Height observed:	0.61 m

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Shakemap)		Tsunami		GDACS score
NEIC	0		0.4		0.4
us6000kd0n	Scaled population (raster)	0	Max wave scenario	0.19m
	C1 shakemap	0	Max wave realtime	0.45m
	C2 shakemap	0
	Country Vulnerability	0
	INFORM_normalised	0

Maximum expected impact using different data sources.

Click on image to zoom it.

Episode Timeline

ID	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1506319	0.3	19 May 2023 02:57	7.7M, 10km	N/A	20 thousand (in 100km)	0.4m (at 00:52)	00:07	PTWC
1506320	0.4	19 May 2023 02:57	7.7M, 10km	5.07	20 thousand (in 100km)	0.4m (at 00:00)	00:07	NTWC
1506325	0.4	19 May 2023 02:57	7.7M, 37.748km	4.21	N/A (in MMI>=VII)	0.5m (at 02:04)	00:19	NEIC
1506482	0.6	19 May 2023 02:57	7.7M, 18.027km	3.89	N/A (in MMI>=VII)	0.6m (at 00:50)	15:27	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.

Estimated Tsunami affected locations

The maximum observed wave height is 0.61m in Lenakel Vu;
The maximum Wave height is 0.3m in Nasau, Fiji. This height is estimated for 19-May-2023 05:01:98.

Alert	Date (UTC)	Name	Country	Wave height (m)
	19-May-2023 05:01:98	Nasau	Fiji	0.3
	19-May-2023 04:49:59	Mele	Vanuatu	0.3
	19-May-2023 06:44:75	Peskarus	Vanuatu	0.2
	19-May-2023 04:00:36	Umetch	Vanuatu	0.2
	19-May-2023 04:34:95	Moeriou	Vanuatu	0.2
	19-May-2023 04:34:95	Mangarisu	Vanuatu	0.2
	19-May-2023 03:47:22	Ombous	Vanuatu	0.2
	19-May-2023 06:09:74	Faroun	Vanuatu	0.2
	19-May-2023 05:27:58	Namara	Fiji	0.2
	19-May-2023 04:41:44	Matavuralevu	Fiji	0.2
	19-May-2023 05:04:65	Nul	Vanuatu	0.2
	19-May-2023 05:04:65	Filakara	Vanuatu	0.2
	19-May-2023 05:37:37	Mokoisa	Fiji	0.2
	19-May-2023 04:31:27	Loanatom	Vanuatu	0.2
	19-May-2023 04:33:27	Yanutha	Fiji	0.2
	19-May-2023 04:43:11	Kurine	New Caledonia	0.2
	19-May-2023 04:52:27	Nanguile	Vanuatu	0.2
	19-May-2023 04:52:27	Vanuatu	Vanuatu	0.2
	19-May-2023 04:29:62	Mbatiri	Fiji	0.2
	19-May-2023 03:39:59	Port Patrick	Vanuatu	0.2
	19-May-2023 04:32:26	Isangel	Vanuatu	0.2
	19-May-2023 04:41:96	Kingston	Norfolk Island	0.2
	19-May-2023 03:43:57	Ipao	Vanuatu	0.1
	19-May-2023 04:29:39	Loounemeloupang	Vanuatu	0.1
	19-May-2023 06:36:22	Natapao	Vanuatu	0.1
	19-May-2023 05:10:09	Emua	Vanuatu	0.1
	19-May-2023 05:10:09	Laonomoa	Vanuatu	0.1
	19-May-2023 05:02:12	Marow	Vanuatu	0.1
	19-May-2023 04:30:51	Korolevu	Fiji	0.1
	19-May-2023 05:08:89	Yawisaghuwi	Vanuatu	0.1
	19-May-2023 05:03:06	Andako	Fiji	0.1
	19-May-2023 04:11:49	Yeruareng	Vanuatu	0.1
	19-May-2023 03:46:58	Ireupuow	Vanuatu	0.1
	19-May-2023 04:34:95	Umpon Mompu	Vanuatu	0.1
	19-May-2023 04:54:52	Port-Havannah	Vanuatu	0.1
	19-May-2023 04:27:58	Malakof	Vanuatu	0.1
	19-May-2023 04:51:21	Kaduvu	Fiji	0.1
	19-May-2023 04:24:74	Leiwoma	Vanuatu	0.1
	19-May-2023 04:37:45	Tavua	Fiji	0.1
	19-May-2023 05:31:31	Vabea	Fiji	0.1
	19-May-2023 05:32:75	Nalele	Fiji	0.1
	19-May-2023 04:24:62	Unpongkor	Vanuatu	0.1
	19-May-2023 05:06:18	Nekapa	Vanuatu	0.1
	19-May-2023 06:07:04	Tafouale	Vanuatu	0.1
	19-May-2023 06:07:04	Liro	Vanuatu	0.1
	19-May-2023 04:28:24	Vatukarasa	Fiji	0.1
	19-May-2023 03:52:36	Nece	New Caledonia	0.1
	19-May-2023 05:02:21	Votlo	Vanuatu	0.1
	19-May-2023 05:07:42	Boloa	Vanuatu	0.1
	19-May-2023 05:07:42	Mangita	Vanuatu	0.1
	19-May-2023 04:25:84	Kouroumanpe	Vanuatu	0.1
	19-May-2023 04:26:94	Lambukuti	Vanuatu	0.1
	19-May-2023 04:44:11	Dakuimbeqa	Fiji	0.1
	19-May-2023 04:36:01	Vaoleli	Vanuatu	0.1
	19-May-2023 04:36:01	Ignal	Vanuatu	0.1
	19-May-2023 04:41:96	Mau	Fiji	0.1
	19-May-2023 05:21:53	Levonu	Vanuatu	0.1
	19-May-2023 05:21:53	Avira	Vanuatu	0.1
	19-May-2023 04:07:23	Wabao	New Caledonia	0.1
	19-May-2023 04:07:23	Medu	New Caledonia	0.1
	19-May-2023 04:50:56	Epantgouei	Vanuatu	0.1
	19-May-2023 04:50:56	Erakor	Vanuatu	0.1
	19-May-2023 04:39:36	Mburelevu	Fiji	0.1
	19-May-2023 04:29:39	Toak	Vanuatu	0.1
	19-May-2023 04:36:01	Paia	Vanuatu	0.1
	19-May-2023 04:39:36	Suva	Fiji	0.1
	19-May-2023 04:39:36	Suva_Viti_Levu_FJ	Fiji Islands	0.1
	19-May-2023 04:54:76	Yasawairara	Fiji	0.1
	19-May-2023 04:53:76	Mbukama	Fiji	0.1
	19-May-2023 04:47:88	Ro	New Caledonia	0.1
	19-May-2023 04:14:64	Imareukak	Vanuatu	0.1
	19-May-2023 04:19:18	Happy Land	Vanuatu	0.1
	19-May-2023 06:03:86	Melip	Vanuatu	0.1
	19-May-2023 05:02:12	Manpay	Vanuatu	0.1
	19-May-2023 05:19:77	Lamarou	Vanuatu	0.1
	19-May-2023 04:23:01	Bouwanga	Fiji	0.1
	19-May-2023 05:30:77	Halos	Vanuatu	0.1
	19-May-2023 04:48:46	Nukuvou	Fiji	0.1
	19-May-2023 05:32:94	Nambouono	Fiji	0.1
	19-May-2023 03:39:37	Mohoun'gha	Vanuatu	0.1
	19-May-2023 04:46:86	Matao Tiupeniu	Vanuatu	0.1
	19-May-2023 05:05:55	Utanlangi	Vanuatu	0.1
	19-May-2023 05:04:14	Valesdir	Vanuatu	0.1
	19-May-2023 05:24:46	Gouaro	New Caledonia	0.1
	19-May-2023 05:22:78	Youelapa	Vanuatu	0.1
	19-May-2023 04:29:25	Endu Pahakol	Vanuatu	0.1
	19-May-2023 03:33:44	Eni	New Caledonia	0.1
	19-May-2023 03:36:19	Tadine	New Caledonia	0.1
	19-May-2023 05:46:03	Ognat	New Caledonia	0.1
	19-May-2023 06:14:62	Malfakhal	Vanuatu	0.1
	19-May-2023 05:54:04	Laravet	Vanuatu	0.1
	19-May-2023 04:39:36	Nepoui	New Caledonia	0.1
	19-May-2023 06:32:66	Terou	Vanuatu	0.1
	19-May-2023 06:32:66	Worovok	Vanuatu	0.1
	19-May-2023 03:54:79	Kuto	New Caledonia	0.1
	19-May-2023 03:54:79	Vao	New Caledonia	0.1
	19-May-2023 04:42:25	Ponkovia	Vanuatu	0.1
	19-May-2023 06:06:86	Port-Vato	Vanuatu	0.1
	19-May-2023 06:57:23	Yelowouwou	Vanuatu	0.1
	19-May-2023 06:57:23	Yaotilie	Vanuatu	0.1
	19-May-2023 06:11:35	Savusavu	Fiji	0.1

See full locations list (RSS)

Initial conditions

Title: ""M 7.7, southeast of the Loyalty Islands""

Fault parameters

Latitude: -23.229
Longitude: 170.694
Length: 112 km
Width: 31 km
Magnitude: 7.7 M

Okada parameters:

Slip: 2.9 m
Strike: 300 (geogr angle: north=0, south=180)
Dip: 22 degree
Rake: 90 degree
Depth: 38 km

Calculation parameters

Calculation space (lon/lat): 160.194, -33.729, 181.194, -12.729
Instead of Step -> use Cell size:1.75 minutes

Sea Level

More information

Timeline:
Tsunami calculations performed to this case, click here
Montecarlo:
Tsunami Montecarlo simulation performed to this case, click here

Tsunami scenario database:
http://www.gdacs.org/tsunami/TsunamiGrid/Disk2/MAG_775/P1705^M0230^0775/locations.xml
Populated places affected by tsunami:
http://webcritech.jrc.ec.europa.eu/ModellingOutput/TsunamiSurge/JETS_System/2023/05/34879/locations.xml
Populated places affected by tsunami (KML):
http://webcritech.jrc.ec.europa.eu/ModellingOutput/TsunamiSurge/JETS_System/2023/05/34879/locations.kml

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

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