2025-10-28 18:07:20 (M4.5) Bismarck Sea -3.4 146.0 (90be5)

M4.5 Earthquake - Bismarck Sea

Preliminary Report

Magnitude	4.5
Date-Time	Universal Time (UTC): 28 Oct 2025 18:07:21 Time near the Epicenter (1): 29 Oct 2025 05:07:21 Time in your area (1): 28 Oct 2025 10:07:21
Location	3.378S 146.048E
Depth	10 km
Distances	201.6 km (125.0 mi) SW of Lorengau, Papua New Guinea 205.8 km (127.6 mi) N of Madang, Papua New Guinea 269.0 km (166.8 mi) E of Wewak, Papua New Guinea 308.1 km (191.0 mi) NNE of Goroka, Papua New Guinea 340.3 km (211.0 mi) NE of Mount Hagen, Papua New Guinea
Location Uncertainty	Horizontal: 12.4 km; Vertical 1.9 km
Parameters	Nph = 15; Dmin = 207.8 km; Rmss = 0.49 seconds; Gp = 124° Version =
Event ID	us 6000rk0y

(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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