M 5.6 in Tonga on 27 Jul 2022 09:36 UTC

Hazard models

Rapid Impact
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: 5.6M
Depth: 10 Km
Lat/Lon: -18.7282 , -173.8523
Event Date: 27 Jul 2022 09:36 UTC
27 Jul 2022 22:36 Local
Exposed Population: About 12000 people in MMI
20 thousand in MMI V
Source: NEIC us6000i5va
Inserted at: 27 Jul 2022 14:18 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
us6000i5va 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
1455275 0 27 Jul 2022 09:36 5.5M, 10km 4.39 N/A (in MMI>=VII) 00:23 NEIC
1455314 0 27 Jul 2022 09:36 5.6M, 10km 5.91 N/A (in MMI>=VII) 04:41 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 1,484) . The alertlevel for this event is GREEN

Intensity Population
<1000 people
15000 people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1455275 -18.711/-173.687 5.5 10.0 4.394 27 Jul 2022 10:01 00:25 (new episode)
2 0 1455314 -18.711/-173.687 5.5 10.0 4.394 27 Jul 2022 11:40 02:03 (new episode)
3 0 1455314 -18.728/-173.852 5.6 10.0 5.428 27 Jul 2022 14:19 04:42 (upd of #2)
4 0 1455314 -18.728/-173.852 5.6 10.0 5.906 28 Jul 2022 10:40 1d 01:03 (upd of #3)

Affected Provinces

Intensity Region Province Country Population
Tonga Tonga 13000 people
Tonga Tonga no people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
Neiafu Tonga Village 4300 people 16 km

see full list


Critical infrastructure

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

Airports

Intensity Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Vavau International VAV 72 Civ. Unpaved Yes 5500 20 km

Ports

Intensity Name LOCODE Country Distance
Neiafu TONEI Tonga 16 km

More information

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