M 4.9 in Tonga on 23 Apr 2025 21:57 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 1478654
Earthquake Magnitude: 4.9M
Depth: 148.1 Km
Lat/Lon: -19.6638 , -175.3817
Event Date: 23 Apr 2025 21:57 UTC
23 Apr 2025 09:57 Local
Exposed Population:
2 thousand in MMI III
Inserted at: 24 Apr 2025 07:03 UTC
INFORM Coping capacity:
1.1 (Tonga)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Rapid Impact)		 GDACS score
NEIC 0 0
us7000pulm Scaled population (vector) 0  
  C1 rapid impact 0  
  C2 rapid impact 0  
  Country Vulnerability 0  
  INFORM_normalised 0  
Maximum expected impact using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Detailed event map. European Union, 2025. 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

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Santorini''s volcano: Ticking time bomb beneath paradise 4/25/2025 1:11:00 PM.

Santorini, Greece’s most famous tourist island, owes its iconic landscape to a massive volcanic eruption that occurred thousands of years ago. Today, the same natural forces that shaped its dramatic cliffs may pose a threat to the island’s
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Strong mag. 5.1 earthquake - 284 km south of Nuku''alofa, Tongatapu, T.. 4/25/2025 12:13:00 PM.

Nearby places The closest larger town where the quake might have been felt is `Ohonua , a town with 1,200 inhabitants in Tonga , in 258 km (161 mi) distance north of the epicenter. People likely experienced very weak shaking there. In the c
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Moderate mag. 4.9 earthquake - South Pacific Ocean, 34 km west of Tofu.. 4/23/2025 10:25:00 PM.

A strong magnitude 4.9 earthquake occurred in the South Pacific Ocean near Tofua Island island, Tonga, in the morning of Thursday, Apr 24, 2025 at 10.57 am local time (GMT +13). The quake had a moderate depth of 148 km (92 mi) and was not f
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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), (3), NEIC (4), OCHA (1), INGV (1), WMO (1), INFORM (2), USGS (2),