M2.8 Earthquake 35 km NW of Stanley, Idaho — August 18, 2020
2020-08-18 23:15:16 UTC (2020-08-18) · approx. 3:15 PM UTC-8 local
On August 18, 2020 at 23:15 UTC, a magnitude 2.8 shallow crustal earthquake struck 35 km NW of Stanley, Idaho, at a depth of 10.0 km and coordinates 44.4602°, -115.2350°.
Physical scale: An earthquake of magnitude 2.8 releases seismic energy equivalent to roughly 239 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 52 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 3 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
-115.2350°E
Technical Information
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Common Questions
How strong was the magnitude 2.8 earthquake near Stanley, Idaho?
The magnitude 2.8 earthquake that struck 35 km NW of Stanley, Idaho on August 18, 2020 at 23:15 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 2.8 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 2.8 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000bgw9). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, August 18, 2020). M2.8 Earthquake 35 km NW of Stanley, Idaho — August 18, 2020. Retrieved October 24, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000bgw9/