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

66 earthquakes were recorded in the U.S. Virgin Islands during August 2026, an average of 2.1 per day.

2 reached magnitude 4 or above and 0 reached magnitude 5 or above. The average focal depth was 29 km.

The month's largest event in the U.S. Virgin Islands was a magnitude 4.1 earthquake near Charlotte Amalie, U.S. Virgin Islands on 01 August 2026 at 20:00 UTC. A magnitude 4.1 earthquake radiates roughly 19 tons of TNT equivalent in seismic energy.

That is well above the the U.S. Virgin Islands monthly average of 39 events over the period we cover — an unusually active month, and up from the 47 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 16 in the magnitude 2 range, 48 in the magnitude 3 range, 2 in the magnitude 4 range.

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

The month's largest events were M4.1 near Charlotte Amalie, U.S. Virgin Islands on 01 August at 19 km; M4.0 near Charlotte Amalie, U.S. Virgin Islands on 01 August at 31 km; M3.8 near Cruz Bay, U.S. Virgin Islands on 04 August at 108 km.

That is 68% above the 39 events the U.S. Virgin Islands averages per month across the 21 months on record.