Idaho earthquakes

M1.9 earthquake 14 km W of Clayton, Idaho

A magnitude 1.9 earthquake struck 14 km W of Clayton, Idaho on Sun, Aug 20, 2017, 9:33 PM MDT (03:33 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.7 32 km NNE of Lowman, Idaho. This one was a foreshock.

Challis 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
1.9 (ML, local (Richter)), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2017-08-21 03:33:12 UTC
Depth
5.1 km (3.2 mi), shallow
Epicenter
44.271° N, 114.582° 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 0.4 km horizontally, 1.5 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
91°
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 1.926 km ESE of Cascade, Idaho · 3328 days ago · 7 km deep · 92 km away
  2. 2.09 km NNE of Challis, Idaho · 3326 days ago · 10 km deep · 47 km away
  3. 1.514 km W of Clayton, Idaho · 3323 days ago · 4 km deep · 1 km away
  4. 1.615 km WSW of Challis, Idaho · 3309 days ago · 7 km deep · 24 km away
  5. 1.911 km W of Clayton, Idaho · 3306 days ago · 10 km deep · 3 km away
  6. 2.19 km N of Stanley, Idaho · 3298 days ago · 10 km deep · 27 km away
  7. 2.18 km N of Stanley, Idaho · 3298 days ago · 4 km deep · 28 km away
  8. 2.6southern Idaho · 3292 days ago · 5 km deep · 38 km away · felt by 1
  9. 1.614 km W of Clayton, Idaho · 3283 days ago · 4 km deep · 1 km away
  10. 1.913 km W of Clayton, Idaho · 3274 days ago · 4 km deep · 1 km away
  11. 2.732 km NNE of Lowman, Idaho · 3274 days ago · 13 km deep · 71 km away · felt by 1
  12. 1.714 km SE of Challis, Idaho · 3272 days ago · 13 km deep · 40 km away

Before

  1. 1.910 km NW of Challis, Idaho · 3335 days ago · 5 km deep · 41 km away
  2. 1.517 km WSW of Challis, Idaho · 3338 days ago · 8 km deep · 25 km away
  3. 2.425 km WNW of Challis, Idaho · 3339 days ago · 4 km deep · 38 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80246764. Read Fri, Oct 2, 2026, 1:04 PM UTC.