M3.0 Earthquake 8 km SW of Gypsum, Kansas — December 8, 2021
2021-12-08 20:25:43 UTC (2021-12-08) · approx. 1:25 PM UTC-7 local
Felt by 29 people across nearby locations.
On December 8, 2021 at 20:25 UTC, a magnitude 3.0 shallow crustal earthquake struck 8 km SW of Gypsum, Kansas, at a depth of 5.0 km and coordinates 38.6609°, -97.5037°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 477 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 71 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 29 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-97.5037°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.0 earthquake near Gypsum, Kansas?
The magnitude 3.0 earthquake that struck 8 km SW of Gypsum, Kansas on December 8, 2021 at 20:25 UTC had a depth of 5.0 km. For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 38.6609°, -97.5037°, which is 8 km SW of Gypsum, Kansas.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.0 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000gamp). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, December 8, 2021). M3.0 Earthquake 8 km SW of Gypsum, Kansas — December 8, 2021. Retrieved February 12, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000gamp/