Idaho earthquakes

M2.3 earthquake 8 km S of Cascade, Idaho

A magnitude 2.3 earthquake struck 8 km S of Cascade, Idaho on Sun, Aug 26, 2018, 6:57 PM MDT (00:57 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.5 12 km NNE of Stanley, Idaho. This one was a foreshock.

Cascade forecastMore in Idaho

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.3 (ML, local (Richter)), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2018-08-27 00:57:17 UTC
Depth
5.7 km (3.5 mi), shallow
Epicenter
44.441° N, 116.055° W
Region
Idaho
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 2.1 km horizontally, 2.2 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
126°
Stations used
6

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.07 km N of Stanley, Idaho · 2960 days ago · 13 km deep · 90 km away
  2. 1.89 km N of Stanley, Idaho · 2951 days ago · 3 km deep · 89 km away
  3. 2.08 km N of Stanley, Idaho · 2951 days ago · 10 km deep · 90 km away
  4. 2.339 km NNW of Stanley, Idaho · 2951 days ago · 5 km deep · 80 km away
  5. 2.112 km WNW of Smiths Ferry, Idaho · 2941 days ago · 6 km deep · 20 km away · felt by 1
  6. 2.18 km N of Stanley, Idaho · 2921 days ago · 4 km deep · 89 km away
  7. 2.43 km NW of Stanley, Idaho · 2921 days ago · 5 km deep · 89 km away
  8. 1.89 km N of Stanley, Idaho · 2921 days ago · 6 km deep · 89 km away
  9. 1.6southern Idaho · 2921 days ago · 6 km deep · 88 km away
  10. 2.512 km NNE of Stanley, Idaho · 2921 days ago · 5 km deep · 94 km away · felt by 1
  11. 1.67 km NNW of Stanley, Idaho · 2921 days ago · 5 km deep · 88 km away
  12. 1.67 km NNW of Stanley, Idaho · 2921 days ago · 4 km deep · 87 km away
  13. 1.69 km N of Stanley, Idaho · 2920 days ago · 4 km deep · 89 km away
  14. 1.68 km N of Stanley, Idaho · 2917 days ago · 6 km deep · 89 km away
  15. 2.49 km N of Stanley, Idaho · 2917 days ago · 3 km deep · 90 km away
  16. 2.041 km NW of New Meadows, Idaho · 2913 days ago · 5 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80307429. Read Sun, Oct 4, 2026, 12:41 PM UTC.