M2.9 Earthquake 23 km WNW of Stanley, Idaho — October 21, 2020
2020-10-21 20:59:19 UTC (2020-10-21) · approx. 12:59 PM UTC-8 local
On October 21, 2020 at 20:59 UTC, a magnitude 2.9 shallow crustal earthquake struck 23 km WNW of Stanley, Idaho, at a depth of 10.0 km and coordinates 44.3051°, -115.2087°.
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 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
-115.2087°E
Technical Information
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Common Questions
How strong was the magnitude 2.9 earthquake near Stanley, Idaho?
The magnitude 2.9 earthquake that struck 23 km WNW of Stanley, Idaho on October 21, 2020 at 20:59 UTC had a depth of 10.0 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 2.9 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 2.9 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000cb07). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, October 21, 2020). M2.9 Earthquake 23 km WNW of Stanley, Idaho — October 21, 2020. Retrieved January 9, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000cb07/