M1.9 earthquake 26 km ESE of Cascade, Idaho
A magnitude 1.9 earthquake struck 26 km ESE of Cascade, Idaho on Tue, Aug 22, 2017, 12:23 PM MDT (18:23 UTC), 7 km (5 mi) below the surface.
A larger quake followed: M2.7 32 km NNE of Lowman, Idaho. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.9 (ML, local (Richter)), micro
- Magnitude from
- Montana Bureau of Mines and Geology
- Local time
- UTC
- 2017-08-22 18:23:01 UTC
- Depth
- 7.3 km (4.5 mi), shallow
- Epicenter
- 44.444° N, 115.718° 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, 1.0 km in depth
- Magnitude uncertainty
- ±0.18
- Depth from
- From location
- Station coverage gap
- 106°
- Stations used
- 8
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 2 in the 30 days before it.
After
- 1.514 km W of Clayton, Idaho · 3323 days ago · 4 km deep · 93 km away
- 2.626 km NW of New Meadows, Idaho · 3312 days ago · 5 km deep · 99 km away
- 1.911 km W of Clayton, Idaho · 3306 days ago · 10 km deep · 95 km away
- 2.19 km N of Stanley, Idaho · 3298 days ago · 10 km deep · 65 km away
- 2.18 km N of Stanley, Idaho · 3298 days ago · 4 km deep · 65 km away
- 1.614 km W of Clayton, Idaho · 3283 days ago · 4 km deep · 93 km away
- 1.913 km W of Clayton, Idaho · 3274 days ago · 4 km deep · 93 km away
- 2.732 km NNE of Lowman, Idaho · 3274 days ago · 13 km deep · 23 km away · felt by 1
Before
Earthquakes todayIdaho earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event mb80247079. Read Fri, Oct 2, 2026, 3:02 PM UTC.