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

13 earthquakes were recorded in the U.S. Virgin Islands during December 2025, an average of 0.4 per day.

0 reached magnitude 4 or above and 0 reached magnitude 5 or above. The average focal depth was 50 km.

The month's largest event in the U.S. Virgin Islands was a magnitude 3.8 earthquake near Cruz Bay, U.S. Virgin Islands on 04 December 2025 at 13:52 UTC. A magnitude 3.8 earthquake radiates roughly 8.4 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 16 recorded the previous month.

77% of events here are shallow (under 70 km), 23% intermediate (70–300 km) and 0% deep-focus (over 300 km). The mix is dominated by shallow crustal events, with a minority of intermediate-depth activity.

By band, the catalogue holds 1 in the magnitude 2 range, 12 in the magnitude 3 range.

Activity peaked on 04 December, when 5 events were recorded.

The month's largest events were M3.8 near Cruz Bay, U.S. Virgin Islands on 04 December at 117 km; M3.7 near Cruz Bay, U.S. Virgin Islands on 18 December at 53 km; M3.4 near Charlotte Amalie, U.S. Virgin Islands on 18 December at 93 km.

That is 67% below the 39 events the U.S. Virgin Islands averages per month across the 21 months on record.