M4.5 Earthquake 40 km WSW of Codrington, Antigua and Barbuda — April 21, 2021
2021-04-21 19:43:51 UTC (2021-04-21) · approx. 3:43 PM UTC-4 local
Felt by 4 people across nearby locations.
On April 21, 2021 at 19:43 UTC, a magnitude 4.5 shallow crustal earthquake struck 40 km WSW of Codrington, Antigua and Barbuda, at a depth of 24.8 km and coordinates 17.5222°, -62.2004°.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 4 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-62.2004°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.5 earthquake near Codrington, Antigua and Barbuda?
The magnitude 4.5 earthquake that struck 40 km WSW of Codrington, Antigua and Barbuda on April 21, 2021 at 19:43 UTC had a depth of 24.8 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 17.5222°, -62.2004°, which is 40 km WSW of Codrington, Antigua and Barbuda.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us6000e3hp). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, April 21, 2021). M4.5 Earthquake 40 km WSW of Codrington, Antigua and Barbuda — April 21, 2021. Retrieved July 3, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000e3hp/