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: 18.027 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 18:24 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 0.6 0.6
us6000kd0n Scaled population (raster) 0 Max wave alert 0.48m  
  C1 shakemap 0 Max wave realtime 0.61m  
  C2 shakemap 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
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  0.5m in Umetch, Vanuatu. This height is estimated for 19-May-2023 03:47:86.

Alert Date (UTC) Name Country Wave height (m)
19-May-2023 03:47:86 Umetch Vanuatu  0.5
19-May-2023 04:37:86 Leiwoma Vanuatu  0.3
19-May-2023 04:44:84 Kingston Norfolk Island  0.3
19-May-2023 03:54:01 Anelghowhat Vanuatu  0.3
19-May-2023 05:22:76 Marow Vanuatu  0.3
19-May-2023 04:53:01 Nasau Fiji  0.3
19-May-2023 03:52:32 Waisisi Vanuatu  0.3
19-May-2023 04:13:54 Ireupuow Vanuatu  0.3
19-May-2023 04:49:07 Mele Vanuatu  0.2
19-May-2023 04:37:17 Boloa Vanuatu  0.2
19-May-2023 04:14:05 Yeruareng Vanuatu  0.2
19-May-2023 05:04:76 Laonomoa Vanuatu  0.2
19-May-2023 04:51:88 Soso Fiji  0.2
19-May-2023 04:14:32 Lenakel Vanuatu  0.2
19-May-2023 04:59:53 Sounai Vanuatu  0.2
19-May-2023 03:59:04 Wabao New Caledonia  0.2
19-May-2023 03:59:04 Medu New Caledonia  0.2
19-May-2023 03:59:04 Eni New Caledonia  0.2
19-May-2023 04:19:98 Umpon Mompu Vanuatu  0.2
19-May-2023 05:49:56 Peskarus Vanuatu  0.2
19-May-2023 05:05:78 Vanuatu Vanuatu  0.2
19-May-2023 04:39:24 Filakara Vanuatu  0.2
19-May-2023 04:30:26 Korovisilou Fiji  0.2
19-May-2023 04:34:42 Tavio Vanuatu  0.2
19-May-2023 04:19:98 Yawisaghuwi Vanuatu  0.2
19-May-2023 04:58:17 Pawe Vanuatu  0.2
19-May-2023 04:59:53 Nukuvou Fiji  0.2
19-May-2023 05:15:34 Tavua Fiji  0.2
19-May-2023 05:08:23 Malakof Vanuatu  0.2
19-May-2023 04:39:46 Naikorokoro Fiji  0.2
19-May-2023 05:07:17 Nabouwalu Fiji  0.2
19-May-2023 05:05:78 Vabea Fiji  0.2
19-May-2023 04:34:42 Nanguile Vanuatu  0.1
19-May-2023 04:34:42 Eratap Vanuatu  0.1
19-May-2023 04:52:25 Port-Havannah Vanuatu  0.1
19-May-2023 06:56:78 Halos Vanuatu  0.1
19-May-2023 04:37:17 Hnadid New Caledonia  0.1
19-May-2023 03:41:99 Ipao Vanuatu  0.1
19-May-2023 04:45:49 Natapao Vanuatu  0.1
19-May-2023 05:55:27 Melip Vanuatu  0.1
19-May-2023 06:15:33 Valesdir Vanuatu  0.1
19-May-2023 06:15:33 Manpay Vanuatu  0.1
19-May-2023 04:45:42 Kouroumanpe Vanuatu  0.1
19-May-2023 05:57:87 Kaduvu Fiji  0.1
19-May-2023 05:11:02 Nepoui New Caledonia  0.1
19-May-2023 06:07:06 Happy Land Vanuatu  0.1
19-May-2023 04:46:04 Epantgouei Vanuatu  0.1
19-May-2023 04:46:04 Erakor Vanuatu  0.1
19-May-2023 04:29:13 Korolevu Fiji  0.1
19-May-2023 04:54:87 Namara Fiji  0.1
19-May-2023 04:35:14 Ignal Vanuatu  0.1
19-May-2023 05:04:52 Vandravandra Fiji  0.1
19-May-2023 05:30:21 Nalele Fiji  0.1
19-May-2023 05:44:31 Nekapa Vanuatu  0.1
19-May-2023 05:41:62 Mangita Vanuatu  0.1
19-May-2023 04:27:42 Lambukuti Vanuatu  0.1
19-May-2023 04:25:73 Moeriou Vanuatu  0.1
19-May-2023 04:28:28 Toak Vanuatu  0.1
19-May-2023 05:17:93 Yanutha Fiji  0.1
19-May-2023 07:16:86 Laruru Vanuatu  0.1
19-May-2023 05:29:93 Levuka Fiji  0.1
19-May-2023 03:39:56 Mohoun'gha Vanuatu  0.1
19-May-2023 03:59:06 Ognat New Caledonia  0.1
19-May-2023 04:45:49 Mburelevu Fiji  0.1
19-May-2023 04:40:83 Station Ouaneko New Caledonia  0.1
19-May-2023 05:29:24 Mate Vanuatu  0.1
19-May-2023 04:53:44 Utanlangi Vanuatu  0.1
19-May-2023 04:36:09 Vaoleli Vanuatu  0.1
19-May-2023 05:17:74 Suva Fiji  0.1
19-May-2023 05:17:74 Suva_Viti_Levu_FJ Fiji Islands  0.1
19-May-2023 05:39:36 Tuvutha Fiji  0.1
19-May-2023 04:52:53 Nece New Caledonia  0.1
19-May-2023 04:41:62 Matao Tiupeniu Vanuatu  0.1
19-May-2023 05:02:63 Faroun Vanuatu  0.1
19-May-2023 06:28:74 Burumba Vanuatu  0.1
19-May-2023 05:18:45 Port-Vato Vanuatu  0.1
19-May-2023 04:41:38 Dakuimbeqa Fiji  0.1
19-May-2023 06:01:64 Teci Fiji  0.1
19-May-2023 05:19:65 Liku Fiji  0.1
19-May-2023 05:42:98 Nambouono Fiji  0.1
19-May-2023 07:11:51 Malfakhal Vanuatu  0.1
19-May-2023 05:07:17 Gouaro New Caledonia  0.1
19-May-2023 06:17:65 Mau Fiji  0.1
19-May-2023 07:19:17 Fali Vanuatu  0.1
19-May-2023 07:19:17 Yaotilie Vanuatu  0.1
19-May-2023 04:24:28 Doking New Caledonia  0.1
19-May-2023 06:27:05 Laravet Vanuatu  0.1
19-May-2023 06:04:38 Tafouale Vanuatu  0.1
19-May-2023 06:04:38 Liro Vanuatu  0.1
19-May-2023 05:54:17 Asavagas Vanuatu  0.1
19-May-2023 04:44:68 Noumea France  0.1
19-May-2023 04:37:86 Jasmori Vanuatu  0.1
19-May-2023 05:20:84 Lauthala Bay Fiji  0.1
19-May-2023 06:02:32 Vao Vanuatu  0.1
19-May-2023 06:04:38 Nauouo Fiji  0.1
19-May-2023 05:23:16 Nasau Fiji  0.1
19-May-2023 05:47:16 Terou Vanuatu  0.1
19-May-2023 05:47:94 Ladhu Vanuatu  0.1
19-May-2023 06:39:77 Nukusa Fiji  0.1
19-May-2023 06:16:96 Rave-rave Fiji  0.1
19-May-2023 07:12:45 Vunikura Fiji  0.1
19-May-2023 05:12:18 Chepenehe New Caledonia  0.1
19-May-2023 07:07:46 Ponkovia Vanuatu  0.1
19-May-2023 07:17:37 Yelowouwou Vanuatu  0.1
19-May-2023 04:39:24 Lalati Fiji  0.1
19-May-2023 04:31:34 Olal Vanuatu  0.1
19-May-2023 05:06:13 Keteira Fiji  0.1
19-May-2023 04:54:43 Levonu Vanuatu  0.1

See full locations list (RSS)


Initial conditions

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

Fault parameters

  • Latitude: -23.185
  • Longitude: 170.763
  • 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: 18 km

Calculation parameters

  • Calculation space (lon/lat): 160.263, -33.685, 181.263, -12.685
  • 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

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