Overall Green Earthquake alert in Tonga on 09 Dec 2008 18:51 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve alerts, information exchange and coordination in the first phase after major sudden-onset disasters.

M 5.1 in Tonga on 09 Dec 2008 18:51 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:	591 Km
Lat/Lon:	-20.79 , -178.86
Event Date:	09 Dec 2008 18:51 UTC 10 Dec 2008 06:51 Local
Exposed Population:	about 2000 people within 100km
Source:	EMSC
Inserted at:	10 Dec 2008 08:02 UTC

GDACS Score

For more info on GDACS alert score click here.

	Earthquake		GDACS score
EMSC	0.5		0.5
	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

ID	Score	Date	Mag, Depth	MMI*	Population**	Delay (hh:mm)	Source
49196	0.5	09 Dec 2008 18:51	5.2M, 593km	N/A	2 thousand (in 100km)	00:16	GEOFON
49197	0.5	09 Dec 2008 18:51	5.1M, 584.7km	N/A	2 thousand (in 100km)	00:21	NEIC
49215	0.5	09 Dec 2008 18:51	5.1M, 591km	N/A	2 thousand (in 100km)	13:11	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	1500 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

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					32 km

More information

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

Disclaimer
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