M3.4 Earthquake 6 km SW of Mount Shasta, CA — September 17, 2026
2026-09-17 14:26:24 UTC (42 min ago) · approx. 6:26 AM UTC-8 local
On September 17, 2026 at 14:26 UTC, a magnitude 3.4 shallow crustal earthquake struck 6 km SW of Mount Shasta, CA, at a depth of 47.9 km and coordinates 41.2735°, -122.3692°.
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 136 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-122.3692°E
Technical Information
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Common Questions
How strong was the magnitude 3.4 earthquake near Mount Shasta, CA?
The magnitude 3.4 earthquake that struck 6 km SW of Mount Shasta, CA on September 17, 2026 at 14:26 UTC had a depth of 47.9 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: nc75437222). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 17, 2026). M3.4 Earthquake 6 km SW of Mount Shasta, CA — September 17, 2026. Retrieved September 17, 2026 from https://www.earthquaketracker.org/earthquakes/event/nc75437222/