Overall Green Earthquake alert in Tonga Islands from 05 Dec 2022 16:19 UTC to 16:19

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 5.6 in Tonga Islands from 05 Dec 2022 16:19 UTC to 16:19

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:	35 Km
Lat/Lon:	-15.2887 , -173.0425
Event Date:	05 Dec 2022 16:19 UTC 05 Dec 2022 04:19 Local
Exposed Population:	1 thousand in MMI IV
Source:	NEIC us6000j71p
Inserted at:	05 Dec 2022 16:54 UTC
INFORM Coping capacity of the alert score:	1.1 ()

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Shakemap)		GDACS score
NEIC	0		0
us6000j71p	Scaled population (vector)	0
	C1 shakemap	-0.59
	C2 shakemap	0.53
	Country Vulnerability	0
	INFORM_normalised	1

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

ID	Date	Mag, Depth	MMI*	Population**	Delay (hh:mm)	Source
1477079	05 Dec 2022 16:19	5.7M, 35km	3.82	N/A (in MMI>=VII)	00:22	NEIC
1477080	05 Dec 2022 16:19	5.6M, 35km	3.74	N/A (in MMI>=VII)	00:34	NEIC
1478245	05 Dec 2022 16:19	5.6M, 10km	3.52	N/A (in MMI>=VII)	6d 05:17	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 Samoa ,of Samoa. The alertlevel for this event is GREEN

Intensity	Population

Shakemaps Timeline

Shake id #	episodeid	Lat/Lon	Magnitude	Depth	Max MMI	Date shake (UTC)	Delay (hh:mm)
1	1477079	-173.051/-15.292	5.7	35	3.818	05 Dec 2022 16:45	00:25	(new episode)
2	1477080	-173.051/-15.292	5.7	35	3.818	05 Dec 2022 16:54	00:35	(new episode)
3	1477080	-173.042/-15.289	5.6	35	3.747	05 Dec 2022 17:00	00:40	(upd of #2)
4	1477080	-173.042/-15.289	5.6	35	3.747	05 Dec 2022 18:28	02:09	(upd of #3)
5	1477080	-173.042/-15.289	5.6	35	3.747	06 Dec 2022 16:40	1d 00:21	(upd of #4)
6	1477080	-173.037/-15.285	5.6	35	3.743	06 Dec 2022 20:40	1d 04:21	(upd of #5)
7	1478245	-173.121/-15.223	5.6	10	3.524	12 Dec 2022 00:51	6d 08:31	(new episode)

Affected Provinces

Intensity	Region Province	Country	Population
	Samoa	Samoa	no people

Affected populated places. Areas of interest

Intensity	Name	Region Province	Country	City class	Population	Distance
	Falehau		Tonga	Village	-	104 km
	Hihifo		Tonga	Village	<1000 people	108 km

see full list

Critical infrastructure

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

More information

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

Disclaimer
While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information.
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