Overall Green Earthquake alert in Tonga Islands from 19 May 2022 09:23 UTC to 09:23

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 6 in Tonga Islands from 19 May 2022 09:23 UTC to 09:23

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:	6.0M
Depth:	149.6 Km
Lat/Lon:	-16.099 , -173.619
Event Date:	19 May 2022 09:23 UTC 19 May 2022 22:23 Local
Exposed Population:	1 thousand in 100km
Source:	PTWC pt22139000
Inserted at:	19 May 2022 09:36 UTC
INFORM Coping capacity of the alert score	1.1 ()

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Rapid Impact)		GDACS score
PTWC	0		0
pt22139000	Scaled population (vector)	0
	C1 rapid impact	-0.59
	C2 rapid impact	0.53
	Country Vulnerability	0
	INFORM_normalised	1

Maximum expected impact using different data sources.

Episode Timeline

ID	Alert	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1444018		0	19 May 2022 09:23	6M, 149.6km	4.22	1 thousand (in 100km)		00:12	PTWC
1444020		0	19 May 2022 09:23	5.8M, 113km	4.3	1 thousand (in 100km)		00:24	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	1100 people
75 km	1100 people
50 km	1100 people
20 km	no people
10 km	no people
5 km	no people
2 km	no people

Affected Provinces

Affected populated places

Name	Region Province	Country	City class	Population	Distance
Falehau		Tonga	Village	-	20 km
Hihifo		Tonga	Village	<1000 people	21 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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