M3.1 Earthquake 4 km WSW of Mayagüez, Puerto Rico — November 10, 2023
2023-11-10 23:12:29 UTC (2023-11-10) · approx. 7:12 PM UTC-4 local
On November 10, 2023 at 23:12 UTC, a magnitude 3.1 intermediate depth earthquake struck 4 km WSW of Mayagüez, Puerto Rico, at a depth of 104.4 km and coordinates 18.1877°, -67.1762°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 801 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 90 m — a useful intuition for the size of the slip patch on the fault.

Earthquake Details
-67.1762°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Mayagüez, Puerto Rico?
The magnitude 3.1 earthquake that struck 4 km WSW of Mayagüez, Puerto Rico on November 10, 2023 at 23:12 UTC had a depth of 104.4 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 3.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr71431213). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, November 10, 2023). M3.1 Earthquake 4 km WSW of Mayagüez, Puerto Rico — November 10, 2023. Retrieved November 10, 2023 from https://www.earthquaketracker.org/earthquakes/event/pr71431213/