M3.5 Earthquake 31 km NE of Ranchester, Wyoming — April 28, 2026
2026-04-28 19:03:58 UTC (2026-04-28) · approx. 12:03 PM UTC-7 local
On April 28, 2026 at 19:03 UTC, a magnitude 3.5 shallow crustal earthquake struck 31 km NE of Ranchester, Wyoming, at a depth of 0.0 km and coordinates 45.1173°, -106.9020°.
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
-106.9020°E
Technical Information
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Common Questions
How strong was the magnitude 3.5 earthquake near Ranchester, Wyoming?
The magnitude 3.5 earthquake that struck 31 km NE of Ranchester, Wyoming on April 28, 2026 at 19:03 UTC had a depth of 0.0 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: us7000sgrn). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, April 28, 2026). M3.5 Earthquake 31 km NE of Ranchester, Wyoming — April 28, 2026. Retrieved July 11, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000sgrn/