M3.4 Earthquake 66 km N of Cruz Bay, U.S. Virgin Islands — January 18, 2021
2021-01-18 23:10:52 UTC (2021-01-18) · approx. 7:10 PM UTC-4 local
On January 18, 2021 at 23:10 UTC, a magnitude 3.4 shallow crustal earthquake struck 66 km N of Cruz Bay, U.S. Virgin Islands, at a depth of 54.0 km and coordinates 18.9318°, -64.8030°.
Physical scale: An earthquake of magnitude 3.4 releases seismic energy equivalent to roughly 2.0 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 136 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-64.8030°E
Technical Information
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Common Questions
How strong was the magnitude 3.4 earthquake near Cruz Bay, U.S. Virgin Islands?
The magnitude 3.4 earthquake that struck 66 km N of Cruz Bay, U.S. Virgin Islands on January 18, 2021 at 23:10 UTC had a depth of 54.0 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: pr2021018013). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, January 18, 2021). M3.4 Earthquake 66 km N of Cruz Bay, U.S. Virgin Islands — January 18, 2021. Retrieved January 18, 2021 from https://www.earthquaketracker.org/earthquakes/event/pr2021018013/