M3.7 Earthquake 87 km N of Cruz Bay, U.S. Virgin Islands — March 13, 2021
2021-03-13 21:24:01 UTC (2021-03-13) · approx. 5:24 PM UTC-4 local
On March 13, 2021 at 21:24 UTC, a magnitude 3.7 shallow crustal earthquake struck 87 km N of Cruz Bay, U.S. Virgin Islands, at a depth of 66.0 km and coordinates 19.1090°, -64.6508°.
Physical scale: An earthquake of magnitude 3.7 releases seismic energy equivalent to roughly 5.0 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 209 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-64.6508°E
Technical Information
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Common Questions
How strong was the magnitude 3.7 earthquake near Cruz Bay, U.S. Virgin Islands?
The magnitude 3.7 earthquake that struck 87 km N of Cruz Bay, U.S. Virgin Islands on March 13, 2021 at 21:24 UTC had a depth of 66.0 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 3.7 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.7 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr2021072008). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, March 13, 2021). M3.7 Earthquake 87 km N of Cruz Bay, U.S. Virgin Islands — March 13, 2021. Retrieved May 26, 2021 from https://www.earthquaketracker.org/earthquakes/event/pr2021072008/