Earthquakes in Puerto Rico — April 2026

172 earthquakes were recorded in Puerto Rico during April 2026, an average of 5.7 per day.

3 reached magnitude 4 or above and 0 reached magnitude 5 or above. The average focal depth was 22 km.

The month's largest event in Puerto Rico was a magnitude 4.3 earthquake near Río Lajas, Puerto Rico on 13 April 2026 at 02:06 UTC. A magnitude 4.3 earthquake radiates roughly 43 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 157 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, 46 in the magnitude 3 range, 3 in the magnitude 4 range.

Activity peaked on 22 April, when 12 events were recorded.

The month's largest events were M4.3 near Río Lajas, Puerto Rico on 13 April at 121 km; M4.2 near Río Lajas, Puerto Rico on 13 April at 115 km; M4.0 near Emajagua, Puerto Rico on 11 April at 10 km.

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