2025-08-18 07:48:43 UPDATED: (M5.5) Tonga -15.3 -173.3 (70fa9)

M5.5 Earthquake - Tonga

Preliminary Report

Magnitude	5.5
Date-Time	Universal Time (UTC): 18 Aug 2025 07:48:43 Time near the Epicenter (1): 18 Aug 2025 20:48:43 Time in your area (1): 18 Aug 2025 13:18:43
Location	15.286S 173.344W
Depth	10 km
Distances	88.5 km (54.8 mi) NNE of Hihifo, Tonga 233.9 km (145.0 mi) SW of Apia, Samoa 305.5 km (189.4 mi) WSW of Pago Pago, American Samoa 676.7 km (419.6 mi) NNE of Nuku'alofa, Tonga 791.2 km (490.5 mi) E of Labasa, Fiji
Location Uncertainty	Horizontal: 9.7 km; Vertical 1.9 km
Parameters	Nph = 69; Dmin = 320.4 km; Rmss = 0.95 seconds; Gp = 45° Version =
Event ID	us 6000r1uh

(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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