2026-04-20 01:21:17 (M5.4) western Indian-Antarctic Ridge -49.7 117.3 (70fa9)

M5.4 Earthquake - western Indian-Antarctic Ridge

Preliminary Report

Magnitude	5.4
Date-Time	Universal Time (UTC): 20 Apr 2026 01:21:17 Time near the Epicenter (1): 20 Apr 2026 09:21:17 Time in your area (1): 20 Apr 2026 06:51:17
Location	49.680S 117.314E
Depth	10 km
Distances	1623.8 km (1006.8 mi) S of Little Grove, Australia 1628.4 km (1009.6 mi) S of Albany, Australia 1787.5 km (1108.3 mi) S of Busselton, Australia 1821.5 km (1129.3 mi) S of Bunbury, Australia 1972.5 km (1222.9 mi) S of Perth, Australia
Location Uncertainty	Horizontal: 10.9 km; Vertical 1.9 km
Parameters	Nph = 33; Dmin = 1861.2 km; Rmss = 0.47 seconds; Gp = 62° Version =
Event ID	us 6000srgj

(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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