M3.1 Earthquake 21 km S of Antelope Valley-Crestview, Wyoming — July 21, 2023
2023-07-21 21:42:21 UTC (2023-07-21) · approx. 2:42 PM UTC-7 local
On July 21, 2023 at 21:42 UTC, a magnitude 3.1 shallow crustal earthquake struck 21 km S of Antelope Valley-Crestview, Wyoming, at a depth of 0.0 km and coordinates 44.0379°, -105.4359°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 674 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 83 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-105.4359°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.1 earthquake near Antelope Valley-Crestview, Wyoming?
The magnitude 3.1 earthquake that struck 21 km S of Antelope Valley-Crestview, Wyoming on July 21, 2023 at 21:42 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 3.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000khi6). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 21, 2023). M3.1 Earthquake 21 km S of Antelope Valley-Crestview, Wyoming — July 21, 2023. Retrieved September 28, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000khi6/