M 5.9 in Tonga Islands on 02 Jun 2019 10:36 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: 5.9M
Depth: 10 Km
Lat/Lon: -21.2206 , -173.8934
Event Date: 02 Jun 2019 10:36 UTC
Exposed Population: No people within 100km
Source: NEIC us70003ud5
Inserted at: 03 Jun 2019 10:38 UTC
INFORM Coping capacity of the alert score: 1.1 (Tonga)


For more info on GDACS alert score click here.
GDACS score
NEIC 0 0
us70003ud5 Scaled population (raster) 0  
  C1 shakemap -0.59  
  C2 shakemap 0.53  
  Country Vulnerability 0  
  INFORM_normalised 1  
Maximum expected impact using different data sources.

ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1262741 0 02 Jun 2019 10:36 5.9M, 10km N/A No people affected 1d 00:02 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.

Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1262741 -21.221/-173.893 5.9 10.0 None 02 Jun 2019 10:58 00:21 (new episode)
2 0 1262741 -21.221/-173.893 5.9 10.0 None 02 Jun 2019 12:38 02:01 (upd of #1)
3 0 1262741 -21.221/-173.893 5.9 10.0 None 03 Jun 2019 10:38 1d 00:02 (upd of #2)

Affected Provinces

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Affected populated places. Areas of interest

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see full list

Critical infrastructure

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


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Nuclear plants

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More information

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