M4.4 Earthquake 31 km NE of Newcastle, Saint Kitts and Nevis — August 11, 2023
2023-08-11 15:18:50 UTC (2023-08-11) · approx. 11:18 AM UTC-4 local
On August 11, 2023 at 15:18 UTC, a magnitude 4.4 intermediate depth earthquake struck 31 km NE of Newcastle, Saint Kitts and Nevis, at a depth of 102.3 km and coordinates 17.4309°, -62.4054°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-62.4054°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Newcastle, Saint Kitts and Nevis?
The magnitude 4.4 earthquake that struck 31 km NE of Newcastle, Saint Kitts and Nevis on August 11, 2023 at 15:18 UTC had a depth of 102.3 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000kz93). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 11, 2023). M4.4 Earthquake 31 km NE of Newcastle, Saint Kitts and Nevis — August 11, 2023. Retrieved October 17, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000kz93/