2025-07-06 20:31:43 (M5.5) Tonga -21.0 -174.4 (1cbfb)

[USGS ENS <ens@xxxxxxxxxxxx>]

M5.5 Earthquake - Tonga

Preliminary Report

Magnitude	5.5
Date-Time	Universal Time (UTC): 6 Jul 2025 20:31:43 Time near the Epicenter (1): 7 Jul 2025 09:31:43 Time in your area (1): 6 Jul 2025 12:31:43
Location	21.001S 174.440W
Depth	10 km
Distances	65.6 km (40.7 mi) NE of ‘Ohonua, Tonga 80.6 km (49.9 mi) E of Nuku‘alofa, Tonga 807.5 km (500.7 mi) ESE of Nasinu, Fiji 812.9 km (504.0 mi) ESE of Suva, Fiji 826.1 km (512.2 mi) SE of Labasa, Fiji
Location Uncertainty	Horizontal: 11.9 km; Vertical 1.9 km
Parameters	Nph = 68; Dmin = 833.4 km; Rmss = 0.80 seconds; Gp = 57° Version =
Event ID	us 7000qb20

(1) Nominal Standard Time; local and daylight savings time zone may differ.
For updates, maps, and technical information
see: Event Page or USGS Earthquake Hazards Program
National Earthquake Information Center
U.S. Geological Survey


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