M3.1 Earthquake 45 km NW of Island Park, Idaho — August 23, 2023
2023-08-23 20:48:16 UTC (2023-08-23) · approx. 1:48 PM UTC-7 local
On August 23, 2023 at 20:48 UTC, a magnitude 3.1 shallow crustal earthquake struck 45 km NW of Island Park, Idaho, at a depth of 7.3 km and coordinates 44.6897°, -111.7995°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 674 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 83 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-111.7995°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Island Park, Idaho?
The magnitude 3.1 earthquake that struck 45 km NW of Island Park, Idaho on August 23, 2023 at 20:48 UTC had a depth of 7.3 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 3.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000kqi2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 23, 2023). M3.1 Earthquake 45 km NW of Island Park, Idaho — August 23, 2023. Retrieved October 28, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000kqi2/