M3.1 Earthquake 74 km N of Brenas, Puerto Rico — February 18, 2023
2023-02-18 20:34:20 UTC (2023-02-18) · approx. 4:34 PM UTC-4 local
On February 18, 2023 at 20:34 UTC, a magnitude 3.1 shallow crustal earthquake struck 74 km N of Brenas, Puerto Rico, at a depth of 16.1 km and coordinates 19.1370°, -66.3253°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 773 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 88 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.3253°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 74 km N of Brenas, Puerto Rico on February 18, 2023 at 20:34 UTC had a depth of 16.1 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: pr71396643). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, February 18, 2023). M3.1 Earthquake 74 km N of Brenas, Puerto Rico — February 18, 2023. Retrieved February 18, 2023 from https://www.earthquaketracker.org/earthquakes/event/pr71396643/