Earthquakes in Costa Rica — October 2025

5 earthquakes were recorded in Costa Rica during October 2025, an average of 0.2 per day.

5 reached magnitude 4 or above and 1 reached magnitude 5 or above. The average focal depth was 23 km.

The month's largest event in Costa Rica was a magnitude 5.9 earthquake near Quepos, Costa Rica on 22 October 2025 at 03:57 UTC. A magnitude 5.9 earthquake radiates roughly 10,676 tons of TNT equivalent in seismic energy.

That is well above the Costa Rica monthly average of 3 events over the period we cover — an unusually active month, and up from the 2 recorded the previous month.

100% of events here are shallow (under 70 km), 0% intermediate (70–300 km) and 0% deep-focus (over 300 km). Almost everything here is crustal. That is characteristic of transform faulting or continental deformation rather than subduction — and it means shaking at the surface is strong for the magnitudes involved.

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

The month's largest events were M5.9 near Quepos, Costa Rica on 22 October at 31 km; M4.7 near Tilarán, Costa Rica on 04 October at 10 km; M4.6 near San Vito, Costa Rica on 25 October at 10 km.

That is 72% above the 3 events Costa Rica averages per month across the 20 months on record.

This month also holds the strongest earthquake recorded in Costa Rica in our entire catalogue.