M2.1 Earthquake 10 km ESE of Jefferson, Oklahoma — September 17, 2020
2020-09-17 17:03:18 UTC (2020-09-17) · approx. 10:03 AM UTC-7 local
On September 17, 2020 at 17:03 UTC, a magnitude 2.1 shallow crustal earthquake struck 10 km ESE of Jefferson, Oklahoma, at a depth of 7.4 km and coordinates 36.6963°, -97.6760°.
Physical scale: An earthquake of magnitude 2.1 releases seismic energy equivalent to roughly 20.6 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 17 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 1 citizen response 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
-97.6760°E
Technical Information
Common Questions
How strong was the magnitude 2.1 earthquake near Jefferson, Oklahoma?
The magnitude 2.1 earthquake that struck 10 km ESE of Jefferson, Oklahoma on September 17, 2020 at 17:03 UTC had a depth of 7.4 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 2.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 2.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ok2020siio). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, September 17, 2020). M2.1 Earthquake 10 km ESE of Jefferson, Oklahoma — September 17, 2020. Retrieved September 17, 2020 from https://www.earthquaketracker.org/earthquakes/event/ok2020siio/