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
(Rapid Impact)		 GDACS score
NEIC 0 0
us6000i5va Scaled population (raster) 0  
  C1 rapid impact -0.59  
  C2 rapid impact 0.53  
  Country Vulnerability 0  
  INFORM_normalised 0.94  
Maximum expected impact using different data sources.

The green area correspond to areas affected by strong shaking (MMI VI or higher) according to the simulation.


Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1455275 0 27 Jul 2022 09:36 5.5M, 10km 4.45 N/A (in MMI>=VII) N/A 00:23 NEIC
1455314 0 27 Jul 2022 09:36 5.6M, 10km 5.48 N/A (in MMI>=VII) N/A 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.

Rapid Impact

The results presented below are calculated with the ShakeMap open source software (USGS) using only earthquake hypocenter information to provide a rapid estimation of the ground motion and shaking intensity without taking into account any instrumental observations or earthquake source scaling laws.

Exposed population

The earthquake happened in Tonga ,of Tonga (population 98,000) . The alertlevel for this event is GREEN

Intensity Population
15000 people

Affected Provinces

Intensity Region Province Country Population
Tonga Tonga 11000 people
Tonga Tonga 1500 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.