M2.7 Earthquake 19 km NNE of Kootenai, Idaho — September 30, 2024
2024-09-30 15:15:49 UTC (2024-09-30) · approx. 7:15 AM UTC-8 local
Felt by 24 people across nearby locations.
On September 30, 2024 at 15:15 UTC, a magnitude 2.7 shallow crustal earthquake struck 19 km NNE of Kootenai, Idaho, at a depth of 10.3 km and coordinates 48.4850°, -116.4545°. This earthquake was detected by 37 seismic stations with good location accuracy and was assigned a USGS significance rating of 120, placing it among routine seismic activity.
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 24 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
-116.4545°E
Technical Information
Common Questions
How strong was the magnitude 2.7 earthquake near Kootenai, Idaho?
The magnitude 2.7 earthquake that struck 19 km NNE of Kootenai, Idaho on September 30, 2024 at 15:15 UTC had a depth of 10.3 km. For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 48.4850°, -116.4545°, which is 19 km NNE of Kootenai, 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.
Actions
Location
Authoritative source: USGS event page (event ID: us7000nh8y). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, September 30, 2024). M2.7 Earthquake 19 km NNE of Kootenai, Idaho — September 30, 2024. Retrieved December 14, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000nh8y/