3.3

M3.3 Earthquake 20 km NE of Luquillo, Puerto RicoApril 17, 2026

2026-04-17 00:54:35 UTC (2 days ago)

On April 17, 2026 at 00:54 UTC, a magnitude 3.3 intermediate depth earthquake struck 20 km NE of Luquillo, Puerto Rico, at a depth of 89.6 km and coordinates 18.5070°, -65.5848°.

Map showing earthquake epicenter at 18.51°, -65.58°

Earthquake Details

Magnitude
3.3 md
Depth
89.6 km
intermediate depth
Location
18.5070°N
-65.5848°E

Technical Information

Event ID
pr71513783
Event Type
earthquake
Status
✓ Reviewed
Significance
165
Stations Used
20
Azimuthal Gap
181.0°
Min Station Distance
0.257°
RMS Residual
0.34 sec
Last Updated
2026-04-17 03:30:42 UTC

Common Questions

How strong was the magnitude 3.3 earthquake near Luquillo, Puerto Rico?

The magnitude 3.3 earthquake that struck 20 km NE of Luquillo, Puerto Rico on April 17, 2026 at 00:54 UTC had a depth of 89.6 km. For context, this was a minor earthquake typically detected only by instruments.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.3 earthquakes can continue for several days and gradually diminish over time.

What should I do after an earthquake?

If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.