M3.0 earthquake 32 km ENE of Challis, Idaho
A magnitude 3.0 earthquake struck 32 km ENE of Challis, Idaho on Sat, Feb 25, 1978, 2:22 PM MST (21:22 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M3.2 14 km W of Challis, Idaho. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.0 (ML, local (Richter)), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1978-02-25 21:22:19 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 44.657° N, 113.884° 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.
- Depth from
- OPERATOR_ASSIGNED
- 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: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 3.214 km W of Challis, Idaho · 17731 days ago · 5 km deep · 46 km away
- 3.130 km NE of Sun Valley, Idaho · 17692 days ago · 5 km deep · 85 km away
Before
Earthquakes todayIdaho earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000t57. Read Sat, Oct 3, 2026, 3:25 PM UTC.