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: NTWC at00ruvxj7
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
NTWC 0 0.3 0.4
at00ruvxj7 Scaled population (vector) 0 Max wave scenario 0.4m  
  C1 rapid impact 0 Max wave realtime 0.4m  
  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 Nasau, Fiji. This height is estimated for 19-May-2023 04:57:87.

Alert Date (UTC) Name Country Wave height (m)
19-May-2023 04:57:87 Nasau Fiji  0.4
19-May-2023 03:56:67 Ireupuow Vanuatu  0.4
19-May-2023 03:53:51 Anelghowhat Vanuatu  0.3
19-May-2023 04:36:01 Mangarisu Vanuatu  0.3
19-May-2023 05:24:49 Namara Fiji  0.3
19-May-2023 05:03:08 Kingston Norfolk Island  0.2
19-May-2023 04:52:83 Leiwoma Vanuatu  0.2
19-May-2023 04:18:91 Umetch Vanuatu  0.2
19-May-2023 03:59:47 Yeruareng Vanuatu  0.2
19-May-2023 04:05:66 Lenakel Vanuatu  0.2
19-May-2023 04:42:66 Filakara Vanuatu  0.2
19-May-2023 04:45:76 Taunovo Fiji  0.2
19-May-2023 04:09:67 Loanatom Vanuatu  0.2
19-May-2023 04:32:86 Eratap Vanuatu  0.2
19-May-2023 05:16:67 Mate Vanuatu  0.2
19-May-2023 04:49:83 Mele Vanuatu  0.2
19-May-2023 04:45:26 Pawe Vanuatu  0.2
19-May-2023 04:44:31 Mburelevu Fiji  0.2
19-May-2023 04:57:87 Vabea Fiji  0.2
19-May-2023 03:57:66 Wabao New Caledonia  0.2
19-May-2023 03:57:66 Medu New Caledonia  0.2
19-May-2023 03:57:66 Eni New Caledonia  0.2
19-May-2023 04:21:38 Lifou France  0.2
19-May-2023 04:51:64 Kaduvu Fiji  0.2
19-May-2023 04:57:32 Soso Fiji  0.2
19-May-2023 04:38:78 Galoa Fiji  0.2
19-May-2023 04:57:87 Yawisaghuwi Vanuatu  0.2
19-May-2023 04:43:52 Erakor Vanuatu  0.2
19-May-2023 04:43:52 Vanuatu Vanuatu  0.2
19-May-2023 05:10:38 Vatukarasa Fiji  0.2
19-May-2023 04:49:83 Korolevu Fiji  0.2
19-May-2023 05:00:62 Halos Vanuatu  0.2
19-May-2023 05:32:71 Nalele Fiji  0.2
19-May-2023 04:22:35 Navolou Vanuatu  0.2
19-May-2023 05:24:49 Ignal Vanuatu  0.2
19-May-2023 04:37:28 Station Ouaneko New Caledonia  0.1
19-May-2023 06:24:04 Marow Vanuatu  0.1
19-May-2023 04:40:75 Nukuvou Fiji  0.1
19-May-2023 04:42:54 Happy Land Vanuatu  0.1
19-May-2023 04:51:54 Malakof Vanuatu  0.1
19-May-2023 04:57:32 Lambukuti Vanuatu  0.1
19-May-2023 05:33:44 Mokoisa Fiji  0.1
19-May-2023 04:01:77 Nece New Caledonia  0.1
19-May-2023 05:25:38 Valesdir Vanuatu  0.1
19-May-2023 05:25:38 Manpay Vanuatu  0.1
19-May-2023 05:42:25 Nul Vanuatu  0.1
19-May-2023 04:39:04 Nepoui New Caledonia  0.1
19-May-2023 04:25:66 Moeriou Vanuatu  0.1
19-May-2023 04:41:98 Matavuralevu Fiji  0.1
19-May-2023 05:14:94 Ngusui Vanuatu  0.1
19-May-2023 04:02:16 Tadine New Caledonia  0.1
19-May-2023 05:19:06 Dosip New Caledonia  0.1
19-May-2023 05:14:94 Unpongkor Vanuatu  0.1
19-May-2023 04:47:19 Natapao Vanuatu  0.1
19-May-2023 05:40:11 Lamarou Vanuatu  0.1
19-May-2023 05:40:11 Lamen Vanuatu  0.1
19-May-2023 04:50:62 Mangita Vanuatu  0.1
19-May-2023 05:13:52 Yanutha Fiji  0.1
19-May-2023 05:47:31 Ognat New Caledonia  0.1
19-May-2023 04:57:32 Ognahu New Caledonia  0.1
19-May-2023 06:01:66 Utanlangi Vanuatu  0.1
19-May-2023 06:01:66 Nekapa Vanuatu  0.1
19-May-2023 06:17:82 Peskarus Vanuatu  0.1
19-May-2023 05:14:94 Gouaro New Caledonia  0.1
19-May-2023 04:43:67 Kouroumanpe Vanuatu  0.1
19-May-2023 05:27:43 Tavua Fiji  0.1
19-May-2023 03:42:95 Ipao Vanuatu  0.1
19-May-2023 04:32:78 Matao Tiupeniu Vanuatu  0.1
19-May-2023 06:59:34 Laonomoa Vanuatu  0.1
19-May-2023 04:28:04 Toak Vanuatu  0.1
19-May-2023 04:46:94 Naitionitoni Fiji  0.1
19-May-2023 05:40:11 Avira Vanuatu  0.1
19-May-2023 04:12:99 Isavai Vanuatu  0.1
19-May-2023 06:11:63 Boloa Vanuatu  0.1
19-May-2023 05:08:67 Vaoleli Vanuatu  0.1
19-May-2023 04:40:15 Suva Fiji  0.1
19-May-2023 04:40:15 Suva_Viti_Levu_FJ Fiji Islands  0.1
19-May-2023 05:07:74 Levonu Vanuatu  0.1
19-May-2023 06:04:15 Doking New Caledonia  0.1
19-May-2023 05:17:74 Hunete New Caledonia  0.1
19-May-2023 06:32:32 Chepenehe New Caledonia  0.1
19-May-2023 04:46:94 Epantgouei Vanuatu  0.1
19-May-2023 04:48:64 Burumba Vanuatu  0.1
19-May-2023 04:56:21 Dakuimbeqa Fiji  0.1
19-May-2023 04:56:21 Lalati Fiji  0.1
19-May-2023 04:32:34 Olal Vanuatu  0.1
19-May-2023 05:07:74 Crepeta Vanuatu  0.1
19-May-2023 03:41:29 Mohoun'gha Vanuatu  0.1
19-May-2023 03:47:73 Doueoulou New Caledonia  0.1
19-May-2023 06:54:54 Lekia New Caledonia  0.1
19-May-2023 07:12:04 Melip Vanuatu  0.1
19-May-2023 05:54:84 Tafouale Vanuatu  0.1
19-May-2023 06:44:04 Yelowouwou Vanuatu  0.1
19-May-2023 06:44:04 Yaotilie Vanuatu  0.1
19-May-2023 04:41:98 Lauthala Bay Fiji  0.1
19-May-2023 04:38:78 Jasmori Vanuatu  0.1
19-May-2023 05:15:04 Lamap Vanuatu  0.1
19-May-2023 05:29:64 Vao Vanuatu  0.1
19-May-2023 04:52:55 Yasawairara Fiji  0.1
19-May-2023 07:23:97 Palikoulo Vanuatu  0.1
19-May-2023 05:30:31 Nauouo Fiji  0.1
19-May-2023 05:34:32 Nasau Fiji  0.1
19-May-2023 05:06:03 Malfakhal Vanuatu  0.1
19-May-2023 05:50:52 Faroun Vanuatu  0.1
19-May-2023 06:37:67 Brenwe Vanuatu  0.1
19-May-2023 06:02:98 Liro Vanuatu  0.1
19-May-2023 06:50:74 Youelapa Vanuatu  0.1
19-May-2023 05:44:22 Mbukama Fiji  0.1
19-May-2023 05:29:64 Vione Fiji  0.1

See full locations list (RSS)


Initial conditions

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

Fault parameters

  • Latitude: -23.193
  • Longitude: 170.652
  • 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): 160.152, -33.693, 181.152, -12.693
  • 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.