M3.9 Earthquake 22 km SE of Wright, Wyoming — May 31, 2026
2026-05-31 20:20:37 UTC (2026-05-31) · approx. 1:20 PM UTC-7 local
On May 31, 2026 at 20:20 UTC, a magnitude 3.9 shallow crustal earthquake struck 22 km SE of Wright, Wyoming, at a depth of 0.0 km and coordinates 43.6170°, -105.2865°.
Physical scale: An earthquake of magnitude 3.9 releases seismic energy equivalent to roughly 11 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 296 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-105.2865°E
Technical Information
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Common Questions
How strong was the magnitude 3.9 earthquake near Wright, Wyoming?
The magnitude 3.9 earthquake that struck 22 km SE of Wright, Wyoming on May 31, 2026 at 20:20 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 3.9 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.9 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000spq1). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, May 31, 2026). M3.9 Earthquake 22 km SE of Wright, Wyoming — May 31, 2026. Retrieved August 11, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000spq1/