M2.8 Earthquake 42 km NW of San Antonio, Puerto Rico — August 10, 2026
2026-08-10 08:47:07 UTC (2026-08-10) · approx. 4:47 AM UTC-4 local
On August 10, 2026 at 08:47 UTC, a magnitude 2.8 shallow crustal earthquake struck 42 km NW of San Antonio, Puerto Rico, at a depth of 10.7 km and coordinates 18.7828°, -67.3598°.
Physical scale: An earthquake of magnitude 2.8 releases seismic energy equivalent to roughly 223 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 50 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 1 citizen response 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
-67.3598°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 2.8 earthquake near San Antonio, Puerto Rico?
The magnitude 2.8 earthquake that struck 42 km NW of San Antonio, Puerto Rico on August 10, 2026 at 08:47 UTC had a depth of 10.7 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 2.8 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 2.8 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr71527983). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 10, 2026). M2.8 Earthquake 42 km NW of San Antonio, Puerto Rico — August 10, 2026. Retrieved August 10, 2026 from https://www.earthquaketracker.org/earthquakes/event/pr71527983/