M2.7 Earthquake 21 km WNW of Stanley, Idaho — January 28, 2021
2021-01-28 23:27:50 UTC (2021-01-28) · approx. 3:27 PM UTC-8 local
Felt by 12 people across nearby locations.
On January 28, 2021 at 23:27 UTC, a magnitude 2.7 shallow crustal earthquake struck 21 km WNW of Stanley, Idaho, at a depth of 13.1 km and coordinates 44.2853°, -115.1865°.
Physical scale: An earthquake of magnitude 2.7 releases seismic energy equivalent to roughly 169 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 44 m — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Idaho, a region characterized by the track of the Yellowstone hotspot and the Centennial Tectonic Belt, producing both volcanic and tectonic seismicity. View all earthquakes in Idaho.
Learn more: Magnitude scale · Aftershock sequences
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 12 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
-115.1865°E
Technical Information
Common Questions
How strong was the magnitude 2.7 earthquake near Stanley, Idaho?
The magnitude 2.7 earthquake that struck 21 km WNW of Stanley, Idaho on January 28, 2021 at 23:27 UTC had a depth of 13.1 km. For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 44.2853°, -115.1865°, which is 21 km WNW of Stanley, Idaho. View all earthquakes in Idaho.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 2.7 earthquakes can continue for several days and gradually diminish over time.
Has Idaho had earthquakes this big before?
The largest recorded earthquake in Idaho was the M7.3 Borah Peak earthquake of October 28, 1983. Today's magnitude 2.7 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us6000dcrt). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, January 28, 2021). M2.7 Earthquake 21 km WNW of Stanley, Idaho — January 28, 2021. Retrieved April 13, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000dcrt/