M 7.7 in New Caledonia from 19 May 2023 02:57 UTC to 02:57

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: 10 Km
Event Date: 19 May 2023 02:57 UTC
19 May 2023 13:57 Local
Exposed Population: 20 thousand in MMI&>=IV
Source: PTWC pt23139000
Inserted at: 19 May 2023 03:04 UTC
INFORM Coping capacity of the alert score:
1.1 (Vanuatu)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Rapid Impact)		 Tsunami GDACS score
PTWC 0 0.3 0.3
pt23139000 Scaled population (vector) 0 Max wave alert 0.36m  
  C1 rapid impact 0 Max wave realtime 0.36m  
  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
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.

Tsunami affected locations

The maximum Wave height is  0.4m in Ipao, Vanuatu. This height is estimated for 19-May-2023 03:49:14.

Alert Date (UTC) Name Country Wave height (m)
19-May-2023 03:49:14 Ipao Vanuatu  0.4
19-May-2023 04:33:52 Leiwoma Vanuatu  0.4
19-May-2023 05:25:31 Kingston Norfolk Island  0.3
19-May-2023 05:03:16 Nasau Fiji  0.3
19-May-2023 04:06:13 Lenakel Vanuatu  0.3
19-May-2023 04:06:13 Isangel Vanuatu  0.3
19-May-2023 04:44:68 Waisisi Vanuatu  0.3
19-May-2023 04:04:24 Isavai Vanuatu  0.2
19-May-2023 05:02:68 Vunisea Fiji  0.2
19-May-2023 05:06:26 Gasele Fiji  0.2
19-May-2023 04:17:12 Loanatom Vanuatu  0.2
19-May-2023 05:05:83 Laonomoa Vanuatu  0.2
19-May-2023 04:02:64 Ireupuow Vanuatu  0.2
19-May-2023 04:21:21 Epuen Vanuatu  0.2
19-May-2023 04:37:24 Mburelevu Fiji  0.2
19-May-2023 05:03:16 Soso Fiji  0.2
19-May-2023 04:47:41 Natapao Vanuatu  0.2
19-May-2023 04:54:45 Kouroumanpe Vanuatu  0.2
19-May-2023 05:05:55 Naikorokoro Fiji  0.2
19-May-2023 04:49:82 Vabea Fiji  0.2
19-May-2023 05:27:16 Kavala Fiji  0.2
19-May-2023 03:58:26 Yeruareng Vanuatu  0.2
19-May-2023 04:21:21 Umpon Mompu Vanuatu  0.2
19-May-2023 04:34:22 Gouaro New Caledonia  0.2
19-May-2023 04:36:88 Station de Beaupre New Caledonia  0.2
19-May-2023 03:59:25 Wabao New Caledonia  0.2
19-May-2023 03:59:25 Medu New Caledonia  0.2
19-May-2023 03:59:25 Eni New Caledonia  0.2
19-May-2023 05:33:66 Suva_Viti_Levu_FJ Fiji Islands  0.2
19-May-2023 05:27:13 Port-Vila Vanuatu  0.2
19-May-2023 05:27:13 Vanuatu Vanuatu  0.2
19-May-2023 05:06:26 Manpay Vanuatu  0.2
19-May-2023 04:33:52 Ro New Caledonia  0.2
19-May-2023 04:33:52 Thogone New Caledonia  0.2
19-May-2023 04:24:65 Yawisaghuwi Vanuatu  0.2
19-May-2023 05:02:33 Eratap Vanuatu  0.2
19-May-2023 04:36:88 Lambukuti Vanuatu  0.2
19-May-2023 04:37:26 Taunovo Fiji  0.2
19-May-2023 05:03:48 Nul Vanuatu  0.2
19-May-2023 05:25:54 Halos Vanuatu  0.2
19-May-2023 03:39:14 Umetch Vanuatu  0.2
19-May-2023 04:05:92 Yerou Vanuatu  0.2
19-May-2023 05:11:32 Mele Vanuatu  0.2
19-May-2023 05:21:84 Marow Vanuatu  0.2
19-May-2023 05:01:11 Nabouwalu Fiji  0.2
19-May-2023 05:17:06 Yasawairara Fiji  0.2
19-May-2023 05:24:74 Hnadid New Caledonia  0.1
19-May-2023 04:33:44 Matao Tiupeniu Vanuatu  0.1
19-May-2023 05:01:11 Sounai Vanuatu  0.1
19-May-2023 04:39:76 Filakara Vanuatu  0.1
19-May-2023 05:14:42 Pawe Vanuatu  0.1
19-May-2023 04:33:44 Cuvu Fiji  0.1
19-May-2023 06:50:11 Mokoisa Fiji  0.1
19-May-2023 05:07:27 Mate Vanuatu  0.1
19-May-2023 04:22:24 Tadine New Caledonia  0.1
19-May-2023 04:20:48 Happy Land Vanuatu  0.1
19-May-2023 04:45:94 Nanguile Vanuatu  0.1
19-May-2023 05:06:81 Peskarus Vanuatu  0.1
19-May-2023 04:44:65 Nepoui New Caledonia  0.1
19-May-2023 03:46:12 Mohoun'gha Vanuatu  0.1
19-May-2023 04:49:82 Erakor Vanuatu  0.1
19-May-2023 05:51:35 Burumba Vanuatu  0.1
19-May-2023 04:26:02 Moeriou Vanuatu  0.1
19-May-2023 04:44:74 Kaduvu Fiji  0.1
19-May-2023 05:53:62 Naitionitoni Fiji  0.1
19-May-2023 05:16:47 Tavua Fiji  0.1
19-May-2023 04:22:06 Nece New Caledonia  0.1
19-May-2023 04:57:37 Nekapa Vanuatu  0.1
19-May-2023 04:56:51 Boloa Vanuatu  0.1
19-May-2023 04:56:51 Korolevu Fiji  0.1
19-May-2023 04:40:61 Nukuvou Fiji  0.1
19-May-2023 05:10:28 Ngusui Vanuatu  0.1
19-May-2023 03:37:45 Anelghowhat Vanuatu  0.1
19-May-2023 04:57:54 Valesdir Vanuatu  0.1
19-May-2023 04:51:02 Malakof Vanuatu  0.1
19-May-2023 05:14:42 Unpongkor Vanuatu  0.1
19-May-2023 05:14:42 Navolou Vanuatu  0.1
19-May-2023 04:58:82 Rampunalvat Vanuatu  0.1
19-May-2023 04:48:06 Epantgouei Vanuatu  0.1
19-May-2023 04:28:92 Toak Vanuatu  0.1
19-May-2023 04:46:44 Dakuimbeqa Fiji  0.1
19-May-2023 04:47:16 Yanutha Fiji  0.1
19-May-2023 04:37:78 Vaoleli Vanuatu  0.1
19-May-2023 04:37:78 Ignal Vanuatu  0.1
19-May-2023 05:29:08 Namara Fiji  0.1
19-May-2023 05:06:26 Teouta New Caledonia  0.1
19-May-2023 05:35:65 Lekia New Caledonia  0.1
19-May-2023 05:05:83 Faroun Vanuatu  0.1
19-May-2023 05:19:48 Tafouale Vanuatu  0.1
19-May-2023 05:19:48 Liro Vanuatu  0.1
19-May-2023 05:32:27 Keteira Fiji  0.1
19-May-2023 05:35:65 Navuti Fiji  0.1
19-May-2023 05:27:41 Crepeta Vanuatu  0.1
19-May-2023 05:13:29 Ognat New Caledonia  0.1
19-May-2023 07:04:84 Chepenehe New Caledonia  0.1
19-May-2023 05:54:93 Utanlangi Vanuatu  0.1
19-May-2023 05:58:17 Port-Vato Vanuatu  0.1
19-May-2023 05:28:47 Melip Vanuatu  0.1
19-May-2023 04:32:95 Olal Vanuatu  0.1
19-May-2023 06:44:28 Lamarou Vanuatu  0.1
19-May-2023 06:44:28 Lamen Vanuatu  0.1
19-May-2023 04:42:16 Mau Fiji  0.1
19-May-2023 04:38:78 Jasmori Vanuatu  0.1
19-May-2023 05:00:75 Vandravandra Fiji  0.1
19-May-2023 07:02:73 Narovorovo Vanuatu  0.1
19-May-2023 05:06:26 Solevu Fiji  0.1
19-May-2023 06:20:19 Asavagas Vanuatu  0.1
19-May-2023 06:24:69 Hog Harbour Vanuatu  0.1
19-May-2023 04:39:04 Station Ouaneko New Caledonia  0.1
19-May-2023 06:00:62 Ponkovia Vanuatu  0.1
19-May-2023 05:42:79 Rave-rave Fiji  0.1

See full locations list (RSS)


Initial conditions

Title: ""southeast of the Loyalty Islands""

Fault parameters

  • Latitude: -23.242
  • Longitude: 170.655
  • 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: 10 km

Calculation parameters

  • Calculation space (lon/lat): 160.155, -33.742, 181.155, -12.742
  • 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.