M 5.5 in Tonga on 19 Apr 2025 16:55 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 1477982
Earthquake Magnitude: 5.5M
Depth: 32.5 Km
Lat/Lon: -15.1815 , -173.4796
Event Date: 19 Apr 2025 16:55 UTC
19 Apr 2025 04:55 Local
Exposed Population:
1 thousand in MMI IV
Inserted at: 22 Apr 2025 21:23 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
us6000q78n 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

Moderate mag. 4.6 earthquake - 184 km NW of Neiafu, Tonga, on Wednesda.. 4/23/2025 12:46:00 AM.

Nearby places The closest larger town where the quake might have been felt is Neiafu , a town with 4,300 inhabitants in Tonga , in 185 km (115 mi) distance southeast of the epicenter. People likely experienced very weak shaking there. In th
...(more)
Scientists Explore Role of High-Temperature Fluid Flow in Explosivity .. 4/22/2025 4:18:00 PM.

Hundreds of the most dangerous volcanoes on earth are found in the ocean, but almost none are monitored, making the hazards for nearby coastal communities and critical infrastructure difficult to forecast. In the ocean, the explosivity of e
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Strong mag. 5.1 earthquake - South Pacific Ocean, 188 km northeast of .. 4/22/2025 3:06:00 PM.

Nearby places The closest larger town where the quake might have been felt is Pangai , a town with 1,700 inhabitants in Tonga , in 142 km (88 mi) distance northwest of the epicenter. People likely experienced weak shaking there. In the capi
...(more)
The island of Santorini in the Aegean Sea could sink into the waters a.. 4/21/2025 11:41:00 AM.

21.04.2025 14:31 The island of Santorini in the Aegean Sea could sink into the waters at any moment. It is stated that if a major earthquake occurs again on the volcanic island, the island could be completely submerged. On the cliffs of San
...(more)

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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),