Earthquakes in the U.S. Virgin Islands — July 2025

21 earthquakes were recorded in the U.S. Virgin Islands during July 2025, an average of 0.7 per day.

0 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 3.9 earthquake near Cruz Bay, U.S. Virgin Islands on 22 July 2025 at 02:55 UTC. A magnitude 3.9 earthquake radiates roughly 9.6 tons of TNT equivalent in seismic energy.

That is below the the U.S. Virgin Islands monthly average of 39 events over the period we cover — a comparatively quiet month, and down from the 26 recorded the previous month.

95% of events here are shallow (under 70 km), 5% 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, 19 in the magnitude 3 range.

Activity peaked on 09 July, when 3 events were recorded.

The month's largest events were M3.9 near Cruz Bay, U.S. Virgin Islands on 22 July at 38 km; M3.9 near Cruz Bay, U.S. Virgin Islands on 25 July at 41 km; M3.9 near Charlotte Amalie, U.S. Virgin Islands on 15 July at 37 km.

That is 47% below the 39 events the U.S. Virgin Islands averages per month across the 21 months on record.