M3.9 Earthquake 143 km NNE of Cruz Bay, U.S. Virgin Islands — June 29, 2026
2026-06-29 10:31:04 UTC (1 hour ago) · approx. 6:31 AM UTC-4 local
On June 29, 2026 at 10:31 UTC, a magnitude 3.9 shallow crustal earthquake struck 143 km NNE of Cruz Bay, U.S. Virgin Islands, at a depth of 36.0 km and coordinates 19.6011°, -64.4973°.
Physical scale: An earthquake of magnitude 3.9 releases seismic energy equivalent to roughly 10 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 291 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-64.4973°E
Technical Information
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 143 km NNE of Cruz Bay, U.S. Virgin Islands on June 29, 2026 at 10:31 UTC had a depth of 36.0 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.
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 3.9 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr2026180000). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, June 29, 2026). M3.9 Earthquake 143 km NNE of Cruz Bay, U.S. Virgin Islands — June 29, 2026. Retrieved June 29, 2026 from https://www.earthquaketracker.org/earthquakes/event/pr2026180000/