Overall Green Earthquake alert in Tonga Islands Region from 11 Nov 2022 10:48 UTC to 10:48

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 7.5 in Tonga Islands Region from 11 Nov 2022 10:48 UTC to 10:48

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:	7.5M
Depth:	33 Km
Lat/Lon:	-19.3 , -172
Event Date:	11 Nov 2022 10:48 UTC 10 Nov 2022 23:48 Local
Exposed Population:	20 thousand in MMI IV
Source:	NTWC at00rl6jdd
Inserted at:	11 Nov 2022 11:05 UTC
INFORM Coping capacity of the alert score	1.1 ()

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Rapid Impact)		Tsunami		GDACS score
NTWC	0		0.1		0.2
at00rl6jdd	Scaled population (vector)	0	Max wave scenario	0.15m
	C1 rapid impact	0	Max wave realtime	0.15m
	C2 rapid impact	0
	Country Vulnerability	0
	INFORM_normalised	0

Maximum expected impact using different data sources.

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 off shore.

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

Affected Provinces

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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