M4.0 Earthquake 26 km ESE of Wright, Wyoming — July 20, 2021
2021-07-20 20:50:02 UTC (2021-07-20) · approx. 1:50 PM UTC-7 local
On July 20, 2021 at 20:50 UTC, a magnitude 4.0 shallow crustal earthquake struck 26 km ESE of Wright, Wyoming, at a depth of 0.0 km and coordinates 43.6224°, -105.2100°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-105.2100°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.0 earthquake near Wright, Wyoming?
The magnitude 4.0 earthquake that struck 26 km ESE of Wright, Wyoming on July 20, 2021 at 20:50 UTC had a depth of 0.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000exg9). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, July 20, 2021). M4.0 Earthquake 26 km ESE of Wright, Wyoming — July 20, 2021. Retrieved September 25, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000exg9/