M3.1 Earthquake 52 km N of Brenas, Puerto Rico — October 15, 2023
2023-10-15 18:35:27 UTC (2023-10-15) · approx. 2:35 PM UTC-4 local
On October 15, 2023 at 18:35 UTC, a magnitude 3.1 shallow crustal earthquake struck 52 km N of Brenas, Puerto Rico, at a depth of 11.3 km and coordinates 18.9403°, -66.2802°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 747 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 87 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.2802°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Brenas, Puerto Rico?
The magnitude 3.1 earthquake that struck 52 km N of Brenas, Puerto Rico on October 15, 2023 at 18:35 UTC had a depth of 11.3 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: pr71428698). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, October 15, 2023). M3.1 Earthquake 52 km N of Brenas, Puerto Rico — October 15, 2023. Retrieved January 18, 2024 from https://www.earthquaketracker.org/earthquakes/event/pr71428698/