Earthquakes in the U.S. Virgin Islands — September 2025
34 earthquakes were recorded in the U.S. Virgin Islands during September 2025, an average of 1.1 per day.
2 reached magnitude 4 or above and 0 reached magnitude 5 or above. The average focal depth was 37 km.
The month's largest event in the U.S. Virgin Islands was a magnitude 4.1 earthquake near Cruz Bay, U.S. Virgin Islands on 09 September 2025 at 21:57 UTC. A magnitude 4.1 earthquake radiates roughly 21 tons of TNT equivalent in seismic energy.
That is close to the the U.S. Virgin Islands monthly average of 39 events over the period we cover, and up from the 17 recorded the previous month.
91% of events here are shallow (under 70 km), 9% intermediate (70–300 km) and 0% deep-focus (over 300 km). Almost everything here is crustal. That is characteristic of transform faulting or continental deformation rather than subduction — and it means shaking at the surface is strong for the magnitudes involved.
By band, the catalogue holds 2 in the magnitude 2 range, 30 in the magnitude 3 range, 2 in the magnitude 4 range.
Activity peaked on 01 September, when 4 events were recorded.
The month's largest events were M4.1 near Cruz Bay, U.S. Virgin Islands on 09 September at 41 km; M4.0 near Cruz Bay, U.S. Virgin Islands on 09 September at 15 km; M4.0 near Cruz Bay, U.S. Virgin Islands on 01 September at 38 km.
That is 14% below the 39 events the U.S. Virgin Islands averages per month across the 21 months on record.
Largest earthquakes in the U.S. Virgin Islands, September 2025
34 events listed below, newest first. Times are UTC. Click any column header to re-sort.
Frequently asked questions
How many earthquakes hit the U.S. Virgin Islands in September 2025?
34 earthquakes were recorded in the U.S. Virgin Islands during September 2025, of which 2 were magnitude 4 or above.
What was the biggest earthquake in the U.S. Virgin Islands in September 2025?
A magnitude 4.1 event near Cruz Bay, U.S. Virgin Islands on 09 September 2025.
Other months in the U.S. Virgin Islands
Magnitudes for September 2025 reflect the current USGS review status and may have been revised since first publication. See our guides on the magnitude scale, focal depth and why earthquakes cluster.