Earthquakes in Puerto Rico — July 2025

189 earthquakes were recorded in Puerto Rico during July 2025, an average of 6.1 per day.

0 reached magnitude 4 or above and 0 reached magnitude 5 or above. The average focal depth was 18 km.

The month's largest event in Puerto Rico was a magnitude 3.7 earthquake near Suárez, Puerto Rico on 31 July 2025 at 03:07 UTC. A magnitude 3.7 earthquake radiates roughly 6.1 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 down from the 267 recorded the previous month.

98% of events here are shallow (under 70 km), 2% 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 16 in the magnitude 1 range, 142 in the magnitude 2 range, 30 in the magnitude 3 range.

Activity peaked on 25 July, when 15 events were recorded.

The month's largest events were M3.7 near Suárez, Puerto Rico on 31 July at 60 km; M3.7 near Culebra, Puerto Rico on 21 July at 111 km; M3.6 near San Antonio, Puerto Rico on 28 July at 18 km.

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