Earthquakes in Puerto Rico — July 2026

266 earthquakes were recorded in Puerto Rico during July 2026, an average of 8.6 per day.

4 reached magnitude 4 or above and 1 reached magnitude 5 or above. The average focal depth was 17 km.

The month's largest event in Puerto Rico was a magnitude 5.0 earthquake near San Antonio, Puerto Rico on 24 July 2026 at 02:42 UTC. A magnitude 5.0 earthquake radiates roughly 477 tons of TNT equivalent in seismic energy.

That is well above the Puerto Rico monthly average of 173 events over the period we cover — an unusually active month, and up from the 169 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 48 in the magnitude 1 range, 170 in the magnitude 2 range, 44 in the magnitude 3 range, 3 in the magnitude 4 range, 1 in the magnitude 5 range.

Activity peaked on 28 July, when 30 events were recorded.

The month's largest events were M5.0 near San Antonio, Puerto Rico on 24 July at 10 km; M4.8 near San Antonio, Puerto Rico on 24 July at 9 km; M4.8 near San Antonio, Puerto Rico on 24 July at 10 km.

That is 54% above the 173 events Puerto Rico averages per month across the 21 months on record.