Earthquakes in Puerto Rico — January 2026

183 earthquakes were recorded in Puerto Rico during January 2026, an average of 5.9 per day.

0 reached magnitude 4 or above and 0 reached magnitude 5 or above. The average focal depth was 23 km.

The month's largest event in Puerto Rico was a magnitude 3.9 earthquake near Brenas, Puerto Rico on 10 January 2026 at 00:24 UTC. A magnitude 3.9 earthquake radiates roughly 10 tons of TNT equivalent in seismic energy.

That is close to the Puerto Rico monthly average of 173 events over the period we cover, and up from the 172 recorded the previous month.

95% of events here are shallow (under 70 km), 5% 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 25 in the magnitude 1 range, 112 in the magnitude 2 range, 46 in the magnitude 3 range.

Activity peaked on 06 January, when 24 events were recorded.

The month's largest events were M3.9 near Brenas, Puerto Rico on 10 January at 42 km; M3.7 near Suárez, Puerto Rico on 07 January at 63 km; M3.5 near Tierras Nuevas Poniente, Puerto Rico on 21 January at 12 km.

That is close to the 173 events Puerto Rico averages per month across the 21 months on record.