M4.0 Earthquake 159 km NNW of The Valley, Anguilla — November 1, 2021
2021-11-01 20:26:24 UTC (2021-11-01) · approx. 4:26 PM UTC-4 local
On November 1, 2021 at 20:26 UTC, a magnitude 4.0 shallow crustal earthquake struck 159 km NNW of The Valley, Anguilla, at a depth of 43.0 km and coordinates 19.5855°, -63.5216°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 18 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 375 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-63.5216°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.0 earthquake near The Valley, Anguilla?
The magnitude 4.0 earthquake that struck 159 km NNW of The Valley, Anguilla on November 1, 2021 at 20:26 UTC had a depth of 43.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: pr2021305013). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, November 1, 2021). M4.0 Earthquake 159 km NNW of The Valley, Anguilla — November 1, 2021. Retrieved January 14, 2022 from https://www.earthquaketracker.org/earthquakes/event/pr2021305013/