M3.8 Earthquake 54 km WSW of Stella, Puerto Rico — August 28, 2025
2025-08-28 16:06:19 UTC (2025-08-28) · approx. 11:06 AM UTC-5 local
On August 28, 2025 at 16:06 UTC, a magnitude 3.8 intermediate depth earthquake struck 54 km WSW of Stella, Puerto Rico, at a depth of 72.0 km and coordinates 18.1343°, -67.7208°.
Physical scale: An earthquake of magnitude 3.8 releases seismic energy equivalent to roughly 6.4 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 233 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-67.7208°E
Technical Information
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Common Questions
How strong was the magnitude 3.8 earthquake near Stella, Puerto Rico?
The magnitude 3.8 earthquake that struck 54 km WSW of Stella, Puerto Rico on August 28, 2025 at 16:06 UTC had a depth of 72.0 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 3.8 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.8 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr2025240001). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, August 28, 2025). M3.8 Earthquake 54 km WSW of Stella, Puerto Rico — August 28, 2025. Retrieved November 19, 2025 from https://www.earthquaketracker.org/earthquakes/event/pr2025240001/