Earthquakes in Puerto Rico — March 2025

337 earthquakes were recorded in Puerto Rico during March 2025, an average of 10.9 per day.

6 reached magnitude 4 or above and 0 reached magnitude 5 or above. The average focal depth was 20 km.

The month's largest event in Puerto Rico was a magnitude 4.4 earthquake near Indios, Puerto Rico on 20 March 2025 at 09:06 UTC. A magnitude 4.4 earthquake radiates roughly 60 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 159 recorded the previous month.

96% of events here are shallow (under 70 km), 4% 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 27 in the magnitude 1 range, 240 in the magnitude 2 range, 64 in the magnitude 3 range, 6 in the magnitude 4 range.

Activity peaked on 20 March, when 38 events were recorded.

The month's largest events were M4.4 near Indios, Puerto Rico on 20 March at 13 km; M4.4 near Indios, Puerto Rico on 20 March at 12 km; M4.3 near Vieques, Puerto Rico on 01 March at 34 km.

That is 95% above the 173 events Puerto Rico averages per month across the 21 months on record.