M4.0 Earthquake 123 km NNE of Vieques, Puerto Rico — August 27, 2023
2023-08-27 22:15:29 UTC (2023-08-27) · approx. 6:15 PM UTC-4 local
On August 27, 2023 at 22:15 UTC, a magnitude 4.0 intermediate depth earthquake struck 123 km NNE of Vieques, Puerto Rico, at a depth of 96.0 km and coordinates 19.4835°, -65.4580°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 17 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 369 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-65.4580°E
Technical Information
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Common Questions
How strong was the magnitude 4.0 earthquake near Vieques, Puerto Rico?
The magnitude 4.0 earthquake that struck 123 km NNE of Vieques, Puerto Rico on August 27, 2023 at 22:15 UTC had a depth of 96.0 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: pr2023239002). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 27, 2023). M4.0 Earthquake 123 km NNE of Vieques, Puerto Rico — August 27, 2023. Retrieved November 4, 2023 from https://www.earthquaketracker.org/earthquakes/event/pr2023239002/