M 5.1 in Tonga on 02 Oct 2012 11:35 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: 5.1M
Depth: 34.7 Km
Lat/Lon: -21.1088 , -174.474
Event Date: 02 Oct 2012 11:35 UTC
01 Oct 2012 23:35 Local
Exposed Population:
About 89000 people within 100km
Source: NEIC usc000czf7
Inserted at: 02 Oct 2012 11:54 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0.5 0.5
usc000czf7 Scaled population (vector) n.a  
  C1 earthquake n.a  
  C2 earthquake n.a  
  Country Vulnerability n.a  
  INFORM_normalised n.a  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
120009 0.5 02 Oct 2012 11:35 5.1M, 34.7km N/A 90 thousand (in 100km) 00:18 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 98,000) . The nearest places are and Nuku'alofa.

Radius Population
100 km 89000 people
75 km 24000 people
50 km no people
20 km no people
10 km no people
5 km no people
2 km no people

Affected Provinces

Country Region Province Population
Tonga Tonga 98000 people

Affected populated places

Name Region Province Country City class Population Distance
Nuku'alofa Tonga Capital 24000 people 81 km

see full list

Critical infrastructure

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

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Eua Kaufana EUA unknown 62 km
Fua'amotu International TBU 38 Civ. Paved Yes 8700 75 km

Ports

Name LOCODE Country Distance
Eua Island Tonga 57 km
Nuku'alofa TOTBU Tonga 79 km

More information

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