M3.3 Earthquake 71 km N of San Juan, Puerto Rico — May 12, 2025
2025-05-12 18:32:43 UTC (2025-05-12) · approx. 2:32 PM UTC-4 local
On May 12, 2025 at 18:32 UTC, a magnitude 3.3 shallow crustal earthquake struck 71 km N of San Juan, Puerto Rico, at a depth of 21.1 km and coordinates 19.1158°, -66.1085°.
Physical scale: An earthquake of magnitude 3.3 releases seismic energy equivalent to roughly 1.3 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 114 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.1085°E
Technical Information
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Common Questions
How strong was the magnitude 3.3 earthquake near San Juan, Puerto Rico?
The magnitude 3.3 earthquake that struck 71 km N of San Juan, Puerto Rico on May 12, 2025 at 18:32 UTC had a depth of 21.1 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.
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Understanding This Data
Magnitude 3.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr71482238). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, May 12, 2025). M3.3 Earthquake 71 km N of San Juan, Puerto Rico — May 12, 2025. Retrieved July 24, 2025 from https://www.earthquaketracker.org/earthquakes/event/pr71482238/