2025-08-03 15:48:05 (M5.5) western Indian-Antarctic Ridge -47.8 116.0 (70fa9)

M5.5 Earthquake - western Indian-Antarctic Ridge

Preliminary Report

Magnitude	5.5
Date-Time	Universal Time (UTC): 3 Aug 2025 15:48:05 Time near the Epicenter (1): 3 Aug 2025 23:48:05 Time in your area (1): 3 Aug 2025 21:18:05
Location	47.813S 115.951E
Depth	10 km
Distances	1424.5 km (883.2 mi) S of Little Grove, Australia 1429.1 km (886.1 mi) S of Albany, Australia 1573.4 km (975.5 mi) S of Busselton, Australia 1608.8 km (997.5 mi) S of Bunbury, Australia 1761.1 km (1091.9 mi) S of Perth, Australia
Location Uncertainty	Horizontal: 12.2 km; Vertical 1.6 km
Parameters	Nph = 50; Dmin = 1657.0 km; Rmss = 0.54 seconds; Gp = 115° Version =
Event ID	us 6000qxw9

(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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