M2.4 Earthquake 3 km E of Junction City, Illinois — December 19, 2021
2021-12-19 17:45:52 UTC (2021-12-19) · approx. 11:45 AM UTC-6 local
On December 19, 2021 at 17:45 UTC, a magnitude 2.4 shallow crustal earthquake struck 3 km E of Junction City, Illinois, at a depth of 12.5 km and coordinates 38.5765°, -89.0860°.
Physical scale: An earthquake of magnitude 2.4 releases seismic energy equivalent to roughly 66.6 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 29 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 4 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
-89.0860°E
Technical Information
Common Questions
How strong was the magnitude 2.4 earthquake near Junction City, Illinois?
The magnitude 2.4 earthquake that struck 3 km E of Junction City, Illinois on December 19, 2021 at 17:45 UTC had a depth of 12.5 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 2.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 2.4 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: nm60377471). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, December 19, 2021). M2.4 Earthquake 3 km E of Junction City, Illinois — December 19, 2021. Retrieved March 1, 2022 from https://www.earthquaketracker.org/earthquakes/event/nm60377471/