M3.8 Earthquake 8 km W of Bennington, Idaho — May 15, 2026
2026-05-15 11:05:45 UTC (1 day ago) · approx. 4:05 AM UTC-7 local
Felt by 32 people across nearby locations.
On May 15, 2026 at 11:05 UTC, a magnitude 3.8 shallow crustal earthquake struck 8 km W of Bennington, Idaho, at a depth of 1.4 km and coordinates 42.3928°, -111.4245°. The earthquake was reported felt by 32 peopleacross nearby locations, with a maximum shaking intensity of Modified Mercalli Intensity (MMI) 3.9 (light). This earthquake was detected by 22 seismic stations with good location accuracy and was assigned a USGS significance rating of 237, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 3.8 releases seismic energy equivalent to roughly 7.8 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 256 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
ShakeMap — predicted shaking intensity
Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.
Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 32 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
-111.4245°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.8 earthquake near Bennington, Idaho?
The magnitude 3.8 earthquake that struck 8 km W of Bennington, Idaho on May 15, 2026 at 11:05 UTC had a depth of 1.4 km. It was felt by 32 people with maximum shaking intensity of MMI 3.9 (light). For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 42.3928°, -111.4245°, which is 8 km W of Bennington, Idaho. View all earthquakes in Idaho.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.8 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 3.8 event is significantly smaller than that historical record.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: uu80140161). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, May 15, 2026). M3.8 Earthquake 8 km W of Bennington, Idaho — May 15, 2026. Retrieved May 17, 2026 from https://www.earthquaketracker.org/earthquakes/event/uu80140161/