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
Lat/Lon: -23.193 , 170.6519
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 (raster) 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.

The green area correspond to areas affected by strong shaking (MMI VI or higher) according to the simulation.


Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1506319 0 19 May 2023 02:57 7.7M, 10km 5.02 N/A (in MMI>=VII) 0.4m (at 00:52) 00:07 PTWC
1506320 0 19 May 2023 02:57 7.7M, 10km 5.07 N/A (in MMI>=VII) 0.4m (at 00:00) 00:07 NTWC
1506325 0 19 May 2023 02:57 7.7M, 37.748km 5.69 N/A (in MMI>=VII) 0.5m (at 02:04) 00:19 NEIC
1506482 0 19 May 2023 02:57 7.7M, 18.027km 5.42 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.

Rapid Impact

The results presented below are calculated with the ShakeMap open source software (USGS) using only earthquake hypocenter information to provide a rapid estimation of the ground motion and shaking intensity without taking into account any instrumental observations or earthquake source scaling laws.

Exposed population

The earthquake happened in New Caledonia ,of New Caledonia (population 1,313) . The alertlevel for this event is GREEN

Intensity Population
<1000 people

Affected Provinces

Intensity Region Province Country Population
New Caledonia New Caledonia 1300 people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
Miramas New Caledonia Village - 334 km
Ménaku New Caledonia Village - 337 km

see full list

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Intensity Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Mare la Roche MEE 43 Civ. Paved No 3200 329 km

Ports

Intensity Name LOCODE Country Distance
Matthew Island New Caledonia 118 km
Hunter Island New Caledonia 169 km

More information

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