M 5.5 in Tonga Islands on 19 Jun 2022 11:49 UTC
Rapid Impact

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: 5.5M
Depth: 39.12 Km
Lat/Lon: -20.3489 , -174.8098
Event Date: 19 Jun 2022 11:49 UTC
20 Jun 2022 00:49 Local
Exposed Population: Less then 100 people in MMI V
2 thousand in MMI IV
Source: NEIC us7000hiiy
Inserted at: 19 Jun 2022 12:21 UTC
INFORM Coping capacity of the alert score: 1.1 ()


For more info on GDACS alert score click here.
(Rapid Impact)
GDACS score
NEIC 0 0
us7000hiiy Scaled population (raster) 0  
  C1 rapid impact -0.59  
  C2 rapid impact 0.53  
  Country Vulnerability 0  
  INFORM_normalised 1  
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
1449356 0 19 Jun 2022 11:49 5.3M, 40.63km 3.8 less than 100 (in MMI>=VII) N/A 00:23 NEIC
1449358 0 19 Jun 2022 11:49 5.5M, 39.12km 4.09 less than 100 (in MMI>=VII) N/A 00:32 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.