Earthquakes in the U.S. Virgin Islands — September 2026

29 earthquakes were recorded in the U.S. Virgin Islands during September 2026, an average of 1.0 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 3.6 earthquake near Charlotte Amalie, U.S. Virgin Islands on 13 September 2026 at 03:23 UTC. A magnitude 3.6 earthquake radiates roughly 4.2 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 73 recorded the previous month.

79% of events here are shallow (under 70 km), 21% 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 6 in the magnitude 2 range, 23 in the magnitude 3 range.

Activity peaked on 12 September, when 7 events were recorded.

The month's largest events were M3.6 near Charlotte Amalie, U.S. Virgin Islands on 13 September at 13 km; M3.6 near Cruz Bay, U.S. Virgin Islands on 30 September at 80 km; M3.6 near Cruz Bay, U.S. Virgin Islands on 12 September at 8 km.

That is 25% below the 39 events the U.S. Virgin Islands averages per month across the 23 months on record.