Earthquakes in Argentina — October 2025

11 earthquakes were recorded in Argentina during October 2025, an average of 0.4 per day.

11 reached magnitude 4 or above and 1 reached magnitude 5 or above. The average focal depth was 171 km.

The month's largest event in Argentina was a magnitude 5.7 earthquake near El Hoyo, Argentina on 02 October 2025 at 21:37 UTC. A magnitude 5.7 earthquake radiates roughly 5,351 tons of TNT equivalent in seismic energy.

That is below the Argentina monthly average of 18 events over the period we cover — a comparatively quiet month, and down from the 17 recorded the previous month.

9% of events here are shallow (under 70 km), 82% intermediate (70–300 km) and 9% deep-focus (over 300 km). That proportion of deep-focus events is the signature of a subduction zone: only a cold slab descending into the mantle stays brittle enough to rupture at those depths.

By band, the catalogue holds 10 in the magnitude 4 range, 1 in the magnitude 5 range.

Activity peaked on 22 October, when 3 events were recorded.

The month's largest events were M5.7 near El Hoyo, Argentina on 02 October at 571 km; M4.9 near Candelaria, Argentina on 28 October at 163 km; M4.8 near Calingasta, Argentina on 13 October at 113 km.

That is 39% below the 18 events Argentina averages per month across the 21 months on record.