Overall Green Earthquake alert in Tonga on 24 Jul 2025 23:37 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve awareness, information exchange and coordination in the first phase after major sudden-onset disasters.

M 6.6 in Tonga on 24 Jul 2025 23:37 UTC

2025-07-24 23:47 message from NTWC

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 6.6 occurred in the SAMOA ISLANDS region at 1238 pm sst on thursday JULY 24 2025
Some areas MAY have experienced strong shaking
Based on all available data there is no TSUNAMI threat to AMERICAN SAMOA from this earthquake

Measurements Levels

SOURCE	GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)

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