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 23:48 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 938 am chst on friday JULY 25 2025
Based on all available data there is no TSUNAMI threat to guam rota tinian or saipan from this earthquake

Measurements Levels

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

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