M3.1 Earthquake 1 km ENE of Magas Arriba, Puerto Rico — September 29, 2024
2024-09-29 20:36:45 UTC (2024-09-29) · approx. 4:36 PM UTC-4 local
On September 29, 2024 at 20:36 UTC, a magnitude 3.1 shallow crustal earthquake struck 1 km ENE of Magas Arriba, Puerto Rico, at a depth of 15.8 km and coordinates 18.0203°, -66.7570°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 587 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 78 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.7570°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Magas Arriba, Puerto Rico?
The magnitude 3.1 earthquake that struck 1 km ENE of Magas Arriba, Puerto Rico on September 29, 2024 at 20:36 UTC had a depth of 15.8 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: pr71461338). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, September 29, 2024). M3.1 Earthquake 1 km ENE of Magas Arriba, Puerto Rico — September 29, 2024. Retrieved December 6, 2024 from https://www.earthquaketracker.org/earthquakes/event/pr71461338/