M 5.3 in Tonga Islands on 19 Jun 2022 11:49 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: 5.3M
Depth: 40.63 Km
Lat/Lon: -20.3398 , -174.7976
Event Date: 19 Jun 2022 11:49 UTC
20 Jun 2022 00:49 Local
Exposed Population: 50 thousand in 100km
Source: NEIC us7000hiiy
Inserted at: 19 Jun 2022 12:12 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 (vector) 0  
  C1 rapid impact -0.59  
  C2 rapid impact 0.53  
  Country Vulnerability 0  
  INFORM_normalised 1  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1449356 0 19 Jun 2022 11:49 5.3M, 40.63km 3.8 50 thousand (in 100km) 00:23 NEIC
1449358 0 19 Jun 2022 11:49 5.5M, 39.12km 4.8 N/A (in MMI>=VII) 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.

Exposed population

The earthquake happened off shore.

Radius Population
100 km 62000 people
75 km 1500 people
50 km <1000 people
20 km <1000 people
10 km <1000 people
5 km no people
2 km no people

Affected Provinces

Affected populated places

Name Region Province Country City class Population Distance
Nuku'alofa Tonga Capital 24000 people 97 km

see full list

Critical infrastructure

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


Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Haapai HPA 12 Civ. Unpaved Yes 3900 80 km


Name LOCODE Country Distance
Pangai TOPAN Tonga 77 km
Nuku'alofa TOTBU Tonga 96 km

More information

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