M 4.3 in Tonga on 27 Aug 2009 03:08 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.

Updated: this report is based on episode 1.

Earthquake Magnitude: 4.3M
Depth: 637 Km
Lat/Lon: -21.0296 , -179.214
Event Date: 27 Aug 2009 03:08 UTC
26 Aug 2009 15:08 Local
Exposed Population:
about 2000 people within 100km
Source: NEIC us2009kvai
Inserted at: 27 Aug 2009 03:58 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0.5 0.5
us2009kvai 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
64358 0.5 27 Aug 2009 03:08 4.3M, 637km N/A 2 thousand (in 100km) 00:43 NEIC
64359 0.5 27 Aug 2009 03:08 4.3M, 637km N/A 2 thousand (in 100km) 00:49 NEIC
64384 0.5 27 Aug 2009 03:08 4.4M, 636km N/A 2 thousand (in 100km) 05:00 EMSC
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 Fiji , of Fiji (population 755,000) .

Radius Population
100 km 1500 people
75 km 1500 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
Fiji Fiji 760000 people
Tonga Tonga 98000 people

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
Ono-I-Lau ONU unknown 68 km

More information

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