M4.1 Earthquake 21 km SE of Esperanza, Puerto Rico — October 28, 2026
2026-10-28 09:44:00 UTC (3 hours ago) · approx. 5:44 AM UTC-4 local
On October 28, 2026 at 09:44 UTC, a magnitude 4.1 shallow crustal earthquake struck 21 km SE of Esperanza, Puerto Rico, at a depth of 25.0 km and coordinates 17.9548°, -65.3388°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 19 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 388 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 5 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-65.3388°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.1 earthquake near Esperanza, Puerto Rico?
The magnitude 4.1 earthquake that struck 21 km SE of Esperanza, Puerto Rico on October 28, 2026 at 09:44 UTC had a depth of 25.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: pr2026301000). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 28, 2026). M4.1 Earthquake 21 km SE of Esperanza, Puerto Rico — October 28, 2026. Retrieved October 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/pr2026301000/