M 7.4 in New Caledonia on 20 May 2023 01:51 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: 7.4M
Depth: 45 Km
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.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*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.

Tsunami affected locations

The maximum Wave height is  0.2m in Waisisi, Vanuatu. This height is estimated for 20-May-2023 03:05:09.

Alert Date (UTC) Name Country Wave height (m)
20-May-2023 03:05:09 Waisisi Vanuatu  0.2
20-May-2023 03:03:17 Loanatom Vanuatu  0.2
20-May-2023 03:03:17 Lenakel Vanuatu  0.2
20-May-2023 03:03:17 Isangel Vanuatu  0.2
20-May-2023 03:03:17 Loonelapeun Vanuatu  0.2
20-May-2023 02:59:95 Yerou Vanuatu  0.2
20-May-2023 02:28:03 Anelghowhat Vanuatu  0.1
20-May-2023 02:44:46 Port Patrick Vanuatu  0.1
20-May-2023 03:56:59 Onesoua Vanuatu  0.1
20-May-2023 03:13:15 Epuen Vanuatu  0.1
20-May-2023 02:28:45 Umetch Vanuatu  0.1
20-May-2023 02:46:38 Lownepina Vanuatu  0.1
20-May-2023 04:44:32 Faroun Vanuatu  0.1
20-May-2023 04:07:76 Peskarus Vanuatu  0.1
20-May-2023 04:10:91 Votlo Vanuatu  0.1
20-May-2023 04:10:91 Nul Vanuatu  0.1
20-May-2023 03:26:28 Leiwoma Vanuatu  0.1
20-May-2023 03:28:95 Moeriou Vanuatu  0.1
20-May-2023 03:28:95 Mangarisu Vanuatu  0.1
20-May-2023 04:08:31 Pawe Vanuatu  0.1
20-May-2023 03:35:93 Filakara Vanuatu  0.1
20-May-2023 02:41:22 White Sands Vanuatu  0.1
20-May-2023 02:41:22 Ireupuow Vanuatu  0.1
20-May-2023 03:36:83 Nanguile Vanuatu  0.1
20-May-2023 03:36:83 Eratap Vanuatu  0.1
20-May-2023 03:36:83 Vanuatu Vanuatu  0.1
20-May-2023 04:19:36 Mele Vanuatu  0.1
20-May-2023 04:19:36 Port-Vila Vanuatu  0.1
20-May-2023 03:56:59 Marow Vanuatu  0.1
20-May-2023 03:28:84 Lambukuti Vanuatu  0.1
20-May-2023 03:34:62 Sigatoka Fiji  0.1
20-May-2023 03:34:62 Laselase Fiji  0.1
20-May-2023 03:29:15 Tavua Fiji  0.1
20-May-2023 03:22:05 Menaku New Caledonia  0.1
20-May-2023 02:36:46 Mohoun'gha Vanuatu  0.1
20-May-2023 02:36:46 Ipao Vanuatu  0.1
20-May-2023 03:44:69 Matao Tiupeniu Vanuatu  0.1
20-May-2023 04:18:19 Erakor Vanuatu  0.1
20-May-2023 03:47:99 Forari Vanuatu  0.1
20-May-2023 03:33:21 Ebao Vanuatu  0.1
20-May-2023 03:25:63 Malakof Vanuatu  0.1
20-May-2023 03:24:47 Lomawal Fiji  0.1
20-May-2023 03:24:47 Mbatiri Fiji  0.1
20-May-2023 03:59:39 Vaoleli Vanuatu  0.1
20-May-2023 03:59:39 Ignal Vanuatu  0.1
20-May-2023 03:59:39 Lulep Nesa Vanuatu  0.1
20-May-2023 02:26:42 Isino Vanuatu  0.1
20-May-2023 02:38:31 Ombous Vanuatu  0.1
20-May-2023 03:36:15 Epantgouei Vanuatu  0.1
20-May-2023 03:41:42 Natapao Vanuatu  0.1
20-May-2023 03:26:58 Korovisilou Fiji  0.1
20-May-2023 04:00:32 Halos Vanuatu  0.1
20-May-2023 02:20:26 Kurine New Caledonia  0.1
20-May-2023 02:41:64 Yeruareng Vanuatu  0.1
20-May-2023 03:37:82 Xode New Caledonia  0.1
20-May-2023 03:37:82 Mou New Caledonia  0.1
20-May-2023 03:16:13 Umpon Mompu Vanuatu  0.1
20-May-2023 03:16:94 Yawisaghuwi Vanuatu  0.1
20-May-2023 04:24:17 Kingston Norfolk Island  0.1
20-May-2023 03:21:43 Cuvu Fiji  0.1
20-May-2023 04:44:32 Liro Vanuatu  0.1
20-May-2023 03:06:65 Imareukak Vanuatu  0.1
20-May-2023 02:49:19 Ifo Vanuatu  0.1
20-May-2023 04:26:85 Nekapa Vanuatu  0.1
20-May-2023 04:26:85 Laonomoa Vanuatu  0.1
20-May-2023 03:21:62 Kouroumanpe Vanuatu  0.1
20-May-2023 03:24:47 Fonwor Vanuatu  0.1
20-May-2023 03:19:66 Makatea Vanuatu  0.1
20-May-2023 03:26:28 Korolevu Fiji  0.1
20-May-2023 03:26:28 Nikaura Vanuatu  0.1
20-May-2023 03:26:28 Tavio Vanuatu  0.1
20-May-2023 03:26:28 Mate Vanuatu  0.1
20-May-2023 03:36:15 Solevu Fiji  0.1
20-May-2023 04:44:32 Tafouale Vanuatu  0.1
20-May-2023 04:02:78 Rerep Vanuatu  0.1

See full locations list (RSS)


Initial conditions

Title: ""M 7.4, southeast of the Loyalty Islands""

Fault parameters

  • Latitude: -23.1
  • Longitude: 170.4
  • Length: 79 km
  • Width: 22 km
  • Magnitude: 7.4 M

Okada parameters:

  • Slip: 2 m
  • Strike: 300 (geogr angle: north=0, south=180)
  • Dip: 22 degree
  • Rake: 90 degree
  • Depth: 45 km

Calculation parameters

  • Calculation space (lon/lat): 162.9, -30.6, 177.9, -15.6
  • Instead of Step -> use Cell size:1.25 minutes

Sea Level

More information

  • Timeline:
    Tsunami calculations performed to this case, click here

  • Montecarlo:
    Tsunami Montecarlo simulation performed to this case, click here

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