2025-10-28 08:42:18 (M4.9) La Rioja, Argentina -31.5 -66.4 (90be5)

M4.9 Earthquake - La Rioja, Argentina

Preliminary Report

Magnitude	4.9
Date-Time	Universal Time (UTC): 28 Oct 2025 08:42:19 Time near the Epicenter (1): 28 Oct 2025 05:42:19 Time in your area (1): 28 Oct 2025 00:42:19
Location	31.517S 66.369W
Depth	162 km
Distances	79.3 km (49.1 mi) NW of Candelaria, Argentina 121.5 km (75.3 mi) WNW of Villa Dolores, Argentina 128.4 km (79.6 mi) S of Chamical, Argentina 157.5 km (97.6 mi) NW of Merlo, Argentina 197.1 km (122.2 mi) N of San Luis, Argentina
Location Uncertainty	Horizontal: 7.2 km; Vertical 7.2 km
Parameters	Nph = 44; Dmin = 149.1 km; Rmss = 1.05 seconds; Gp = 43° Version =
Event ID	us 6000rjw2

(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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