M2.9 Earthquake 3 km SW of Prattsville, Arkansas — November 18, 2021
2021-11-18 18:01:01 UTC (2021-11-18) · approx. 12:01 PM UTC-6 local
Felt by 25 people across nearby locations.
On November 18, 2021 at 18:01 UTC, a magnitude 2.9 shallow crustal earthquake struck 3 km SW of Prattsville, Arkansas, at a depth of 8.9 km and coordinates 34.2908°, -92.5820°. This earthquake was detected by 20 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 143, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 2.9 releases seismic energy equivalent to roughly 374 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 63 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 25 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
-92.5820°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 2.9 earthquake near Prattsville, Arkansas?
The magnitude 2.9 earthquake that struck 3 km SW of Prattsville, Arkansas on November 18, 2021 at 18:01 UTC had a depth of 8.9 km. For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 34.2908°, -92.5820°, which is 3 km SW of Prattsville, Arkansas.
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: nm60363662). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, November 18, 2021). M2.9 Earthquake 3 km SW of Prattsville, Arkansas — November 18, 2021. Retrieved January 22, 2022 from https://www.earthquaketracker.org/earthquakes/event/nm60363662/