2025-08-22 20:42:25 (M4.9) La Rioja-San Juan border region, Argentina -30.3 -67.5 (90be5)

M4.9 Earthquake - La Rioja-San Juan border region, Argentina

Preliminary Report

Magnitude	4.9
Date-Time	Universal Time (UTC): 22 Aug 2025 20:42:25 Time near the Epicenter (1): 22 Aug 2025 17:42:25 Time in your area (1): 22 Aug 2025 12:42:25
Location	30.279S 67.476W
Depth	27 km
Distances	39.3 km (24.4 mi) N of San Agustín de Valle Fértil, Argentina 112.1 km (69.5 mi) W of Chamical, Argentina 113.6 km (70.4 mi) SSW of La Rioja, Argentina 122.4 km (75.9 mi) E of San José de Jáchal, Argentina 123.8 km (76.8 mi) S of Chilecito, Argentina
Location Uncertainty	Horizontal: 4.5 km; Vertical 5.0 km
Parameters	Nph = 100; Dmin = 181.0 km; Rmss = 1.26 seconds; Gp = 31° Version =
Event ID	us 6000r37j

(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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