M2.9 Earthquake 8 km NNW of Chacra, Colorado — October 17, 2022
2022-10-17 20:16:56 UTC (2022-10-17) · approx. 1:16 PM UTC-7 local
Felt by 26 people across nearby locations.
On October 17, 2022 at 20:16 UTC, a magnitude 2.9 shallow crustal earthquake struck 8 km NNW of Chacra, Colorado, at a depth of 4.7 km and coordinates 39.6415°, -107.4845°. This earthquake was detected by 20 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 137, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 2.9 releases seismic energy equivalent to roughly 338 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 60 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 26 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
-107.4845°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 2.9 earthquake near Chacra, Colorado?
The magnitude 2.9 earthquake that struck 8 km NNW of Chacra, Colorado on October 17, 2022 at 20:16 UTC had a depth of 4.7 km. For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 39.6415°, -107.4845°, which is 8 km NNW of Chacra, Colorado.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 2.9 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000iuec). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, October 17, 2022). M2.9 Earthquake 8 km NNW of Chacra, Colorado — October 17, 2022. Retrieved December 31, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000iuec/