M3.0 Earthquake 6 km SSE of Ponce, Puerto Rico — September 20, 2026
2026-09-20 07:53:04 UTC (1 hour ago) · approx. 3:53 AM UTC-4 local
On September 20, 2026 at 07:53 UTC, a magnitude 3.0 shallow crustal earthquake struck 6 km SSE of Ponce, Puerto Rico, at a depth of 14.0 km and coordinates 17.9513°, -66.6015°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 567 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 77 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.6015°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Ponce, Puerto Rico?
The magnitude 3.0 earthquake that struck 6 km SSE of Ponce, Puerto Rico on September 20, 2026 at 07:53 UTC had a depth of 14.0 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 3.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.0 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr71533463). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 20, 2026). M3.0 Earthquake 6 km SSE of Ponce, Puerto Rico — September 20, 2026. Retrieved September 20, 2026 from https://www.earthquaketracker.org/earthquakes/event/pr71533463/