M 5.7 in Tonga on 03 Nov 2021 03:19 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: 35 Km
Lat/Lon: -24.4817 , -175.9105
Event Date: 03 Nov 2021 03:19 UTC
02 Nov 2021 15:19 Local
Exposed Population: No people affected in 100km
Source: NEIC us7000fr0x
Inserted at: 05 Nov 2021 01:07 UTC
INFORM Coping capacity of the alert score: 1.1 (Tonga)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 GDACS score
NEIC 0 0
us7000fr0x 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
1406619 0 03 Nov 2021 03:19 5.7M, 35km N/A No people affected (in 100km) 00:22 NEIC
1407013 0 03 Nov 2021 03:19 5.7M, 35km N/A No people affected (in 100km) 1d 21:48 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 unknowed a zone. The alertlevel for this event is GREEN

Intensity Population


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1406619 -24.448/-176.106 5.7 35.0 None 03 Nov 2021 03:42 00:23 (new episode)
2 0 1406619 -24.448/-176.106 5.7 35.0 None 03 Nov 2021 05:22 02:03 (upd of #1)
3 0 1407013 -24.448/-176.106 5.7 35.0 None 04 Nov 2021 03:22 1d 00:03 (new episode)
4 0 1407013 -24.482/-175.91 5.7 35.0 None 05 Nov 2021 01:08 1d 21:49 (upd of #3)

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.