M 7.3 in Tonga Islands Region on 11 Nov 2022 10:48 UTC

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: 7.3M
Depth: 24.797 Km
Lat/Lon: -19.3181 , -172.1001
Event Date: 11 Nov 2022 10:48 UTC
10 Nov 2022 23:48 Local
Exposed Population:
Source: NEIC us7000ip0l
Inserted at: 11 Nov 2022 11:27 UTC
INFORM Coping capacity of the alert score: 1.1 ()


For more info on GDACS alert score click here.
(Rapid Impact)
Tsunami GDACS score
NEIC 0 0.1 0.1
us7000ip0l Scaled population (raster) 0 Max wave alert 0.19m  
  C1 rapid impact 0 Max wave realtime 0.19m  
  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
1472551 0 11 Nov 2022 10:48 7.5M, 46km 4.89 N/A (in MMI>=VII) 0.2m (at 01:10) 00:11 GEOFON
1472552 0 11 Nov 2022 10:48 7.5M, 33km 4.53 N/A (in MMI>=VII) 0.4m (at 00:22) 00:12 PTWC
1472553 0 11 Nov 2022 10:48 7.5M, 33km 4.5 N/A (in MMI>=VII) 0.1m (at 00:00) 00:17 NTWC
1472555 0 11 Nov 2022 10:48 7.1M, 10km 4.13 N/A (in MMI>=VII) 0.4m (at 00:22) 00:20 NEIC
1472561 0 11 Nov 2022 10:48 7.3M, 24.797km 6.65 N/A (in MMI>=VII) 0.2m (at 00:22) 00:38 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 unknowed a zone. The alertlevel for this event is GREEN

Intensity Population
no people

Affected Provinces

Critical infrastructure

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

More information

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