Earthquakes in Argentina — September 2025

16 earthquakes were recorded in Argentina during September 2025, an average of 0.5 per day.

16 reached magnitude 4 or above and 2 reached magnitude 5 or above. The average focal depth was 181 km.

The month's largest event in Argentina was a magnitude 5.9 earthquake near San Antonio de los Cobres, Argentina on 04 September 2025 at 04:10 UTC. A magnitude 5.9 earthquake radiates roughly 10,676 tons of TNT equivalent in seismic energy.

That is close to the Argentina monthly average of 18 events over the period we cover, and down from the 18 recorded the previous month.

0% of events here are shallow (under 70 km), 100% intermediate (70–300 km) and 0% deep-focus (over 300 km). A substantial share of intermediate-depth events points to a subducting slab beneath the region rather than purely crustal faulting.

By band, the catalogue holds 14 in the magnitude 4 range, 2 in the magnitude 5 range.

Activity peaked on 12 September, when 3 events were recorded.

The month's largest events were M5.9 near San Antonio de los Cobres, Argentina on 04 September at 176 km; M5.1 near San Antonio de los Cobres, Argentina on 04 September at 178 km; M4.8 near San Antonio de los Cobres, Argentina on 01 September at 167 km.

That is 12% below the 18 events Argentina averages per month across the 21 months on record.