3.4

M3.4 Earthquake 48 km N of Charlotte Amalie, U.S. Virgin IslandsAugust 1, 2026

2026-08-01 20:37:47 UTC (1 hour ago) · approx. 4:37 PM UTC-4 local

MagnitudeM3.4(md)
Time20:37 UTC4:37 PM UTC-4
Depth7.0 kmshallow crustal
Coordinates18.778°, -64.937°
Felt byNo felt reports
Status✓ Reviewed by USGS

On August 1, 2026 at 20:37 UTC, a magnitude 3.4 shallow crustal earthquake struck 48 km N of Charlotte Amalie, U.S. Virgin Islands, at a depth of 7.0 km and coordinates 18.7777°, -64.9370°.

Physical scale: An earthquake of magnitude 3.4 releases seismic energy equivalent to roughly 1.7 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 127 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 18.78°, -64.94°

Earthquake Details

Magnitude
3.4 md
Depth
7.0 km
shallow crustal
Location
18.7777°N
-64.9370°E

Technical Information

Event ID
pr71526963
Event Type
earthquake
Status
✓ Reviewed
Significance
175
Stations Used
12
Azimuthal Gap
222.0°
Min Station Distance
0.423°
RMS Residual
0.22 sec
Last Updated
2026-08-01 21:32:35 UTC

Common Questions

How strong was the magnitude 3.4 earthquake near Charlotte Amalie, U.S. Virgin Islands?

The magnitude 3.4 earthquake that struck 48 km N of Charlotte Amalie, U.S. Virgin Islands on August 1, 2026 at 20:37 UTC had a depth of 7.0 km. For context, this was a minor earthquake typically detected only by instruments.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.4 earthquakes can continue for several days and gradually diminish over time.

Understanding This Data

Magnitude 3.4 earthquakes are typically only recorded by instruments.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: pr71526963). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2026, August 1, 2026). M3.4 Earthquake 48 km N of Charlotte Amalie, U.S. Virgin IslandsAugust 1, 2026. Retrieved August 1, 2026 from https://www.earthquaketracker.org/earthquakes/event/pr71526963/