M3.4 Earthquake 110 km N of Suárez, Puerto Rico — August 18, 2026
2026-08-18 01:32:58 UTC (45 min ago) · approx. 9:32 PM UTC-4 local
On August 18, 2026 at 01:32 UTC, a magnitude 3.4 shallow crustal earthquake struck 110 km N of Suárez, Puerto Rico, at a depth of 45.1 km and coordinates 19.4170°, -65.7172°.
Physical scale: An earthquake of magnitude 3.4 releases seismic energy equivalent to roughly 2.0 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 138 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-65.7172°E
Technical Information
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Common Questions
How strong was the magnitude 3.4 earthquake near Suárez, Puerto Rico?
The magnitude 3.4 earthquake that struck 110 km N of Suárez, Puerto Rico on August 18, 2026 at 01:32 UTC had a depth of 45.1 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 3.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.4 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr71528848). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 18, 2026). M3.4 Earthquake 110 km N of Suárez, Puerto Rico — August 18, 2026. Retrieved August 18, 2026 from https://www.earthquaketracker.org/earthquakes/event/pr71528848/