Idaho earthquakes

M1.9 earthquake 10 km NW of Challis, Idaho

A magnitude 1.9 earthquake struck 10 km NW of Challis, Idaho on Tue, Aug 15, 2017, 2:55 AM MDT (08:55 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.6 southern 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
2017-08-15 08:55:30 UTC
Depth
5.2 km (3.2 mi), shallow
Epicenter
44.584° N, 114.308° 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 0.7 km horizontally, 3.2 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
68°
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 1.914 km W of Clayton, Idaho · 3329 days ago · 5 km deep · 41 km away
  2. 2.09 km NNE of Challis, Idaho · 3325 days ago · 10 km deep · 10 km away
  3. 1.514 km W of Clayton, Idaho · 3323 days ago · 4 km deep · 41 km away
  4. 1.615 km WSW of Challis, Idaho · 3309 days ago · 7 km deep · 17 km away
  5. 1.911 km W of Clayton, Idaho · 3306 days ago · 10 km deep · 41 km away
  6. 2.19 km N of Stanley, Idaho · 3298 days ago · 10 km deep · 58 km away
  7. 2.18 km N of Stanley, Idaho · 3297 days ago · 4 km deep · 59 km away
  8. 2.6southern Idaho · 3292 days ago · 5 km deep · 34 km away · felt by 1
  9. 1.614 km W of Clayton, Idaho · 3283 days ago · 4 km deep · 42 km away

Before

  1. 1.517 km WSW of Challis, Idaho · 3338 days ago · 8 km deep · 17 km away
  2. 2.425 km WNW of Challis, Idaho · 3339 days ago · 4 km deep · 17 km away
  3. 1.723 km ESE of Stanley, Idaho · 3360 days ago · 10 km deep · 61 km away
  4. 1.55 km SE of Salmon, Idaho · 3361 days ago · 7 km deep · 72 km away
  5. 2.513 km ESE of Stanley, Idaho · 3363 days ago · 5 km deep · 59 km away

Earthquakes todayIdaho earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event mb80245239. Read Fri, Oct 2, 2026, 10:32 AM UTC.