Idaho earthquakes

M1.9 earthquake 31 km NNW of Challis, Idaho

A magnitude 1.9 earthquake struck 31 km NNW of Challis, Idaho on Wed, Aug 15, 2018, 1:09 AM MDT (07:09 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M2.8 13 km SE 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.

Open the live map with earthquakes

The earthquake

Magnitude
1.9 (ML, local (Richter)), micro
Magnitude from
Montana Bureau of Mines and Geology
Local time
UTC
2018-08-15 07:09:11 UTC
Depth
9.3 km (5.8 mi), shallow
Epicenter
44.744° N, 114.434° 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 1.7 km horizontally, 2.5 km in depth
Magnitude uncertainty
±0.33
Depth from
From location
Station coverage gap
90°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 25 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 2.426 km NE of Challis, Idaho · 2969 days ago · 5 km deep · 39 km away
  2. 2.110 km W of Clayton, Idaho · 2965 days ago · 13 km deep · 55 km away
  3. 2.07 km N of Stanley, Idaho · 2959 days ago · 13 km deep · 65 km away
  4. 1.813 km NNE of Clayton, Idaho · 2959 days ago · 3 km deep · 41 km away
  5. 1.821 km N of Salmon, Idaho · 2955 days ago · 4 km deep · 82 km away
  6. 1.935 km ESE of Clayton, Idaho · 2955 days ago · 0 km deep · 74 km away
  7. 1.89 km N of Stanley, Idaho · 2950 days ago · 3 km deep · 65 km away
  8. 2.08 km N of Stanley, Idaho · 2950 days ago · 10 km deep · 65 km away
  9. 2.339 km NNW of Stanley, Idaho · 2950 days ago · 5 km deep · 54 km away
  10. 2.813 km SE of Challis, Idaho · 2939 days ago · 5 km deep · 44 km away · felt by 3
  11. 2.336 km ENE of Challis, Idaho · 2937 days ago · 11 km deep · 49 km away
  12. 2.434 km NE of Challis, Idaho · 2937 days ago · 11 km deep · 45 km away
  13. 1.634 km SE of Stanley, Idaho · 2933 days ago · 14 km deep · 89 km away
  14. 1.610 km SE of Challis, Idaho · 2928 days ago · 7 km deep · 41 km away
  15. 2.18 km N of Stanley, Idaho · 2920 days ago · 4 km deep · 65 km away
  16. 2.43 km NW of Stanley, Idaho · 2920 days ago · 5 km deep · 70 km away
  17. 1.89 km N of Stanley, Idaho · 2920 days ago · 6 km deep · 65 km away
  18. 1.6southern Idaho · 2920 days ago · 6 km deep · 66 km away
  19. 2.512 km NNE of Stanley, Idaho · 2920 days ago · 5 km deep · 59 km away · felt by 1
  20. 1.67 km NNW of Stanley, Idaho · 2920 days ago · 5 km deep · 66 km away
  21. 1.67 km NNW of Stanley, Idaho · 2920 days ago · 4 km deep · 67 km away
  22. 1.69 km N of Stanley, Idaho · 2919 days ago · 4 km deep · 65 km away
  23. 1.616 km SE of Challis, Idaho · 2919 days ago · 4 km deep · 47 km away
  24. 1.68 km N of Stanley, Idaho · 2916 days ago · 6 km deep · 65 km away
  25. 2.49 km N of Stanley, Idaho · 2916 days ago · 3 km deep · 64 km away

Before

  1. 1.727 km S of Clayton, Idaho · 2972 days ago · 4 km deep · 81 km away
  2. 2.132 km NNW of Challis, Idaho · 2974 days ago · 5 km deep · 2 km away
  3. 2.212 km W of Clayton, Idaho · 2977 days ago · 12 km deep · 55 km away
  4. 1.752 km NW of Challis, Idaho · 2980 days ago · 7 km deep · 22 km away
  5. 2.121 km NNW of Clayton, Idaho · 2995 days ago · 12 km deep · 37 km away

Earthquakes todayIdaho earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80305974. Read Sat, Oct 3, 2026, 3:15 PM UTC.