M 5.1 in Tonga on 18 Dec 2021 01:12 UTC

Event summary

This earthquake can have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

GDACS ID EQ 1302229
Earthquake Magnitude: 5.1M
Depth: 10 Km
Lat/Lon: -21.8087 , -174.4569
Event Date: 18 Dec 2021 01:12 UTC
17 Dec 2021 13:12 Local
Exposed Population:
20 thousand in 100km
Inserted at: 18 Dec 2021 01:35 UTC
INFORM Coping capacity:
4.6 (Tonga)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0 0
us6000gdah Scaled population (vector) 3.6  
  C1 earthquake 1  
  C2 earthquake 0  
  Country Vulnerability 0  
  INFORM_normalised 0.94  
Maximum expected impact using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Detailed event map. European Union, 2026. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

Updates on volcanic activity (Smithsonian)

Latest media headlines

Magnitude 6.3 earthquake strikes southern Alaska --EMSC 12/22/2021 12:57:00 AM.

Magnitude 6.3 earthquake strikes southern Alaska EMSC. An earthquake of magnitude 6.3 struck the southern Alaska region on Tuesday, the European Mediterranean Seismological Centre (EMSC) said. The quake was at a depth of 125 km (77.67 mi
...(more)
Tonga : un tremblement de terre de magnitude 5.1 a frappé le royaume 12/22/2021 12:53:00 AM.

Le phénomène géologique a provoqué la colère du volcan sous-marin, Hunga Tonga- Hunga Ha'apai, situé à 65 km de la capitale Nuku’alofa. Ce dernier est entré en éruption aux alentours de 20h30 ce lundi 20 décembre. L’explosion a été entendue
...(more)
Magnitude 6.3 earthquake strikes southern Alaska: EMSC 12/22/2021 12:50:00 AM.

An earthquake of magnitude 6.3 struck the southern Alaska region on Tuesday, the European Mediterranean Seismological Centre (EMSC) said. The quake was at a depth of 125 km (77.67 miles), EMSC said. The U.S. Tsunami Warning System said ther
...(more)

View more news

Estimated casualties (PAGER)

USGS estimates the number of casualties for each earthquake for the Prompt Assessment of Global Earthquakes for Response (PAGER) product.
The graph shows the current fatalities estimate.

Exposed population

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: EC-JRC (41), NEIC (4), OCHA (1), WMO (1), (2), INFORM (2), USGS (2),