M3.4 Earthquake 93 km N of Culebra, Puerto Rico — April 27, 2026
2026-04-27 10:39:46 UTC (3 hours ago) · approx. 6:39 AM UTC-4 local
On April 27, 2026 at 10:39 UTC, a magnitude 3.4 shallow crustal earthquake struck 93 km N of Culebra, Puerto Rico, at a depth of 20.2 km and coordinates 19.1472°, -65.2833°.
Physical scale: An earthquake of magnitude 3.4 releases seismic energy equivalent to roughly 1.6 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 123 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-65.2833°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.4 earthquake near Culebra, Puerto Rico?
The magnitude 3.4 earthquake that struck 93 km N of Culebra, Puerto Rico on April 27, 2026 at 10:39 UTC had a depth of 20.2 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 3.4 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.
Actions
Understanding This Data
Magnitude 3.4 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr71514833). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, April 27, 2026). M3.4 Earthquake 93 km N of Culebra, Puerto Rico — April 27, 2026. Retrieved April 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/pr71514833/