Earthquakes in Puerto Rico — March 2026

157 earthquakes were recorded in Puerto Rico during March 2026, an average of 5.1 per day.

1 reached magnitude 4 or above and 0 reached magnitude 5 or above. The average focal depth was 21 km.

The month's largest event in Puerto Rico was a magnitude 4.5 earthquake near San Antonio, Puerto Rico on 30 March 2026 at 09:19 UTC. A magnitude 4.5 earthquake radiates roughly 85 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 129 recorded the previous month.

94% of events here are shallow (under 70 km), 6% 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 24 in the magnitude 1 range, 99 in the magnitude 2 range, 33 in the magnitude 3 range, 1 in the magnitude 4 range.

Activity peaked on 03 March, when 12 events were recorded.

The month's largest events were M4.5 near San Antonio, Puerto Rico on 30 March at 10 km; M3.9 near San Antonio, Puerto Rico on 30 March at 12 km; M3.9 near Luquillo, Puerto Rico on 13 March at 77 km.

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