M3.4 Earthquake 51 km N of Charlotte Amalie, U.S. Virgin Islands — December 19, 2021
2021-12-19 21:55:38 UTC (2021-12-19) · approx. 5:55 PM UTC-4 local
On December 19, 2021 at 21:55 UTC, a magnitude 3.4 shallow crustal earthquake struck 51 km N of Charlotte Amalie, U.S. Virgin Islands, at a depth of 59.0 km and coordinates 18.8060°, -64.9515°.
Physical scale: An earthquake of magnitude 3.4 releases seismic energy equivalent to roughly 2.1 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 140 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-64.9515°E
Technical Information
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Common Questions
How strong was the magnitude 3.4 earthquake near Charlotte Amalie, U.S. Virgin Islands?
The magnitude 3.4 earthquake that struck 51 km N of Charlotte Amalie, U.S. Virgin Islands on December 19, 2021 at 21:55 UTC had a depth of 59.0 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.
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Understanding This Data
Magnitude 3.4 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr2021353006). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, December 19, 2021). M3.4 Earthquake 51 km N of Charlotte Amalie, U.S. Virgin Islands — December 19, 2021. Retrieved December 19, 2021 from https://www.earthquaketracker.org/earthquakes/event/pr2021353006/