Overall Green Earthquake alert in Tonga Islands Region on 11 Nov 2022 10:48 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 7.3 in Tonga Islands Region on 11 Nov 2022 10:48 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:	7.3M
Depth:	24.797 Km
Lat/Lon:	-19.3181 , -172.1001
Event Date:	11 Nov 2022 10:48 UTC 10 Nov 2022 23:48 Local
Exposed Population:
Source:	NEIC us7000ip0l
Inserted at:	11 Nov 2022 11:27 UTC
INFORM Coping capacity of the alert score:	1.1 ()

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Shakemap)		Tsunami		GDACS score
NEIC	0		0.1		0.1
us7000ip0l	Scaled population (raster)	0	Max wave alert	0.19m
	C1 shakemap	-0.59	Max wave realtime	0.19m
	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	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1472551	0.2	11 Nov 2022 10:48	7.5M, 46km	N/A	20 thousand (in 100km)	0.2m (at 01:10)	00:11	GEOFON
1472552	0.3	11 Nov 2022 10:48	7.5M, 33km	4.53	20 thousand (in 100km)	0.4m (at 00:22)	00:12	PTWC
1472553	0.2	11 Nov 2022 10:48	7.5M, 33km	4.5	20 thousand (in 100km)	0.1m (at 00:00)	00:17	NTWC
1472555	0.4	11 Nov 2022 10:48	7.1M, 10km	4.19	N/A (in MMI>=VII)	0.4m (at 00:22)	00:20	NEIC
1472561	0.1	11 Nov 2022 10:48	7.3M, 24.797km	4.22	N/A (in MMI>=VII)	0.2m (at 00:22)	00:38	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 Niue ,of Niue (population 541) . The alertlevel for this event is GREEN

Intensity	Population
	no people

Shakemaps Timeline

Shake id #	episodeid	Lat/Lon	Magnitude	Depth	Max MMI	Date shake (UTC)	Delay (hh:mm)
1	1472561	-19.292/-172.129	7.1	10.0	4.19	11 Nov 2022 11:16	00:27	(new episode)
2	1472561	-19.318/-172.1	7.3	24.8	4.225	11 Nov 2022 11:30	00:42	(upd of #1)
3	1472561	-19.318/-172.1	7.3	24.8	4.225	11 Nov 2022 12:52	02:04	(upd of #2)
4	1472561	-19.318/-172.1	7.3	24.8	4.225	12 Nov 2022 11:40	1d 00:51	(upd of #3)

Affected Provinces

Intensity	Region Province	Country	Population
	Niue	Niue	<1000 people

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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