M 5.7 in Tonga on 30 Jul 2020 19:16 UTC

Hazard models

EQ parameters
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: 5.7M
Depth: 10 Km
Lat/Lon: -19.0322 , -173.4935
Event Date: 30 Jul 2020 19:16 UTC
30 Jul 2020 07:16 Local
Exposed Population: About 15000 people within 100km
Source: NEIC us6000b72l
Inserted at: 31 Jul 2020 19:19 UTC
INFORM Coping capacity of the alert score: 4.6 (Tonga)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 GDACS score
NEIC 0 0
us6000b72l Scaled population (raster) 0  
  C1 shakemap -0.59  
  C2 shakemap 0.53  
  Country Vulnerability 0  
  INFORM_normalised 0.94  
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
1324115 0 30 Jul 2020 19:16 5.6M, 10km 3.52 N/A (in MMI>=VII) 02:02 NEIC
1324126 0 30 Jul 2020 19:16 5.7M, 10km 3.57 N/A (in MMI>=VII) 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.

Exposed population

The earthquake happened in Tonga ,of Tonga (population 80) . The alertlevel for this event is GREEN

Intensity Population
no people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1324115 -18.915/-173.357 5.6 10.0 3.634 30 Jul 2020 19:33 00:16 (new episode)
2 0 1324115 -18.915/-173.357 5.6 10.0 3.519 30 Jul 2020 21:18 02:02 (upd of #1)
3 0 1324126 -19.032/-173.494 5.7 10.0 3.572 30 Jul 2020 21:51 02:34 (new episode)
4 0 1324126 -19.032/-173.494 5.7 10.0 3.572 31 Jul 2020 19:19 1d 00:02 (upd of #3)

Affected Provinces

Intensity Region Province Country Population
Tonga Tonga <1000 people


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.