M3.5 Earthquake 24 km WNW of Carrizo Springs, Texas — October 17, 2026
2026-10-17 13:30:16 UTC (2 hours ago) · approx. 6:30 AM UTC-7 local
On October 17, 2026 at 13:30 UTC, a magnitude 3.5 shallow crustal earthquake struck 24 km WNW of Carrizo Springs, Texas, at a depth of 6.0 km and coordinates 28.6330°, -100.0830°.
Physical scale: An earthquake of magnitude 3.5 releases seismic energy equivalent to roughly 2.7 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 157 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-100.0830°E
Technical Information
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Common Questions
How strong was the magnitude 3.5 earthquake near Carrizo Springs, Texas?
The magnitude 3.5 earthquake that struck 24 km WNW of Carrizo Springs, Texas on October 17, 2026 at 13:30 UTC had a depth of 6.0 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 3.5 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.5 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: tx2026ulnsow). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 17, 2026). M3.5 Earthquake 24 km WNW of Carrizo Springs, Texas — October 17, 2026. Retrieved October 17, 2026 from https://www.earthquaketracker.org/earthquakes/event/tx2026ulnsow/