Idaho earthquakes

M1.6 earthquake 9 km NNW of Stanley, Idaho

A magnitude 1.6 earthquake struck 9 km NNW of Stanley, Idaho on Tue, Nov 20, 2018, 12:31 AM MST (07:31 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M2.8 8 km ESE of Challis, 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
1.6 (ML, local (Richter)), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2018-11-20 07:31:31 UTC
Depth
3.8 km (2.4 mi), shallow
Epicenter
44.298° N, 114.961° 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 1.1 km horizontally, 6.2 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
111°
Stations used
9

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 10 in the 30 days before it.

After

  1. 2.88 km ESE of Challis, Idaho · 2868 days ago · 5 km deep · 68 km away · felt by 3
  2. 1.625 km N of Lowman, Idaho · 2863 days ago · 7 km deep · 50 km away
  3. 2.321 km SSE of Yellow Pine, Idaho · 2862 days ago · 16 km deep · 65 km away
  4. 1.924 km N of Lowman, Idaho · 2861 days ago · 7 km deep · 50 km away
  5. 2.59 km SSE of Clayton, Idaho · 2859 days ago · 5 km deep · 50 km away · felt by 1
  6. 1.619 km NW of Clayton, Idaho · 2856 days ago · 3 km deep · 32 km away
  7. 2.111 km NW of Challis, Idaho · 2855 days ago · 6 km deep · 60 km away
  8. 1.624 km E of Clayton, Idaho · 2853 days ago · 6 km deep · 70 km away
  9. 2.420 km SE of Challis, Idaho · 2849 days ago · 5 km deep · 72 km away
  10. 1.815 km SSE of Clayton, Idaho · 2833 days ago · 6 km deep · 55 km away
  11. 1.7southern Idaho · 2832 days ago · 2 km deep · 53 km away
  12. 1.933 km E of Cascade, Idaho · 2819 days ago · 12 km deep · 61 km away

Before

  1. 3.115 km NNW of Stanley, Idaho · 2874 days ago · 5 km deep · 6 km away · felt by 1
  2. 1.69 km NNW of Stanley, Idaho · 2875 days ago · 4 km deep · 0 km away
  3. 2.125 km SSW of Clayton, Idaho · 2876 days ago · 5 km deep · 48 km away
  4. 1.72 km N of Challis, Idaho · 2879 days ago · 1 km deep · 63 km away
  5. 2.26 km N of Stanley, Idaho · 2891 days ago · 3 km deep · 3 km away
  6. 2.19 km NNW of Stanley, Idaho · 2891 days ago · 4 km deep · 1 km away
  7. 1.76 km N of Stanley, Idaho · 2893 days ago · 0 km deep · 3 km away
  8. 1.65 km N of Stanley, Idaho · 2893 days ago · 3 km deep · 4 km away
  9. 2.320 km WNW of Mackay, Idaho · 2899 days ago · 6 km deep · 95 km away · felt by 1
  10. 1.634 km NW of Mackay, Idaho · 2904 days ago · 1 km deep · 84 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80325359. Read Sat, Oct 3, 2026, 2:17 PM UTC.