M3.6 Earthquake 139 km N of Cruz Bay, U.S. Virgin Islands — December 30, 2020
2020-12-30 21:41:10 UTC (2020-12-30) · approx. 5:41 PM UTC-4 local
On December 30, 2020 at 21:41 UTC, a magnitude 3.6 shallow crustal earthquake struck 139 km N of Cruz Bay, U.S. Virgin Islands, at a depth of 24.0 km and coordinates 19.5780°, -64.5848°.
Physical scale: An earthquake of magnitude 3.6 releases seismic energy equivalent to roughly 4.2 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 193 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-64.5848°E
Technical Information
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Common Questions
How strong was the magnitude 3.6 earthquake near Cruz Bay, U.S. Virgin Islands?
The magnitude 3.6 earthquake that struck 139 km N of Cruz Bay, U.S. Virgin Islands on December 30, 2020 at 21:41 UTC had a depth of 24.0 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 3.6 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.6 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr2020365019). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, December 30, 2020). M3.6 Earthquake 139 km N of Cruz Bay, U.S. Virgin Islands — December 30, 2020. Retrieved March 6, 2021 from https://www.earthquaketracker.org/earthquakes/event/pr2020365019/