2025-12-02 05:59:28 (M4.6) central Mid-Atlantic Ridge 9.4 -40.6 (90be5)

M4.6 Earthquake - central Mid-Atlantic Ridge

Preliminary Report

Magnitude	4.6
Date-Time	Universal Time (UTC): 2 Dec 2025 05:59:28 Time near the Epicenter (1): 2 Dec 2025 02:59:28 Time in your area (1): 1 Dec 2025 21:59:28
Location	9.437N 40.586W
Depth	10 km
Distances	1322.5 km (820.0 mi) NNE of Carutapera, Brazil 1327.4 km (823.0 mi) NNE of Viseu, Brazil 1333.2 km (826.6 mi) NNE of Cururupu, Brazil 1336.9 km (828.9 mi) NNE of Augusto Corrêa, Brazil 1386.0 km (859.3 mi) NNE of São Luís, Brazil
Location Uncertainty	Horizontal: 12.2 km; Vertical 1.9 km
Parameters	Nph = 62; Dmin = 1413.1 km; Rmss = 0.56 seconds; Gp = 77° Version =
Event ID	us 7000rf0y

(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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