M3.9 Earthquake 100 km NNE of Cruz Bay, U.S. Virgin Islands — September 3, 2023
2023-09-03 21:26:38 UTC (2023-09-03) · approx. 5:26 PM UTC-4 local
On September 3, 2023 at 21:26 UTC, a magnitude 3.9 shallow crustal earthquake struck 100 km NNE of Cruz Bay, U.S. Virgin Islands, at a depth of 62.0 km and coordinates 19.2176°, -64.5718°.
Physical scale: An earthquake of magnitude 3.9 releases seismic energy equivalent to roughly 11 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 296 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-64.5718°E
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Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.9 earthquake near Cruz Bay, U.S. Virgin Islands?
The magnitude 3.9 earthquake that struck 100 km NNE of Cruz Bay, U.S. Virgin Islands on September 3, 2023 at 21:26 UTC had a depth of 62.0 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 3.9 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.9 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr2023246004). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 3, 2023). M3.9 Earthquake 100 km NNE of Cruz Bay, U.S. Virgin Islands — September 3, 2023. Retrieved November 17, 2023 from https://www.earthquaketracker.org/earthquakes/event/pr2023246004/