M3.8 Earthquake 105 km NNE of Cruz Bay, U.S. Virgin Islands — September 28, 2025
2025-09-28 23:42:29 UTC (2025-09-28) · approx. 7:42 PM UTC-4 local
On September 28, 2025 at 23:42 UTC, a magnitude 3.8 shallow crustal earthquake struck 105 km NNE of Cruz Bay, U.S. Virgin Islands, at a depth of 66.0 km and coordinates 19.2210°, -64.4281°.
Physical scale: An earthquake of magnitude 3.8 releases seismic energy equivalent to roughly 6.8 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 241 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-64.4281°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.8 earthquake near Cruz Bay, U.S. Virgin Islands?
The magnitude 3.8 earthquake that struck 105 km NNE of Cruz Bay, U.S. Virgin Islands on September 28, 2025 at 23:42 UTC had a depth of 66.0 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: pr2025271001). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 28, 2025). M3.8 Earthquake 105 km NNE of Cruz Bay, U.S. Virgin Islands — September 28, 2025. Retrieved December 11, 2025 from https://www.earthquaketracker.org/earthquakes/event/pr2025271001/