2023-06-21 04:10:53 (M5.5) southern Mid-Atlantic Ridge -12.9 -14.7 (70fa9)

M5.5 Earthquake - southern Mid-Atlantic Ridge

Preliminary Report

Magnitude	5.5
Date-Time	Universal Time (UTC): 21 Jun 2023 04:10:54 Time near the Epicenter (1): 21 Jun 2023 03:10:54 Time in your area (1): 21 Jun 2023 09:40:54
Location	12.867S 14.658W
Depth	10 km
Distances	546.9 km (339.1 mi) S of Georgetown, Saint Helena 2056.1 km (1274.8 mi) SSW of Harper, Liberia 2072.5 km (1285.0 mi) SSW of Greenville, Liberia 2075.7 km (1287.0 mi) SSW of Tabou, Ivory Coast 2134.6 km (1323.5 mi) SSW of Buchanan, Liberia
Location Uncertainty	Horizontal: 8.2 km; Vertical 1.7 km
Parameters	Nph = 68; Dmin = 546.2 km; Rmss = 0.85 seconds; Gp = 46° Version =
Event ID	us 7000ka0y

(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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