M3.8 earthquake 48 km NNE of Spencer, Idaho
A magnitude 3.8 earthquake struck 48 km NNE of Spencer, Idaho on Wed, Jan 2, 1985, 7:29 PM MST (02:29 UTC), 5 km (3 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.8 (ml), minor
- Local time
- UTC
- 1985-01-03 02:29:50 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 44.729° N, 111.869° W
- Region
- Montana
- 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
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 2 in the 30 days before it.
After
- 1.52 km NNW of Hebgen Lake Estates, Montana · 15224 days ago · 13 km deep · 53 km away
- 3.124 km WNW of Hebgen Lake Estates, Montana · 15213 days ago · 5 km deep · 33 km away
- 1.835 km E of West Yellowstone, Montana · 15184 days ago · 3 km deep · 96 km away
- 2.520 km SSW of Mammoth, Wyoming · 15180 days ago · 11 km deep · 87 km away
- 2.820 km SSW of Mammoth, Wyoming · 15180 days ago · 12 km deep · 87 km away
- 1.520 km SSW of Mammoth, Wyoming · 15180 days ago · 5 km deep · 86 km away
- 2.420 km SSW of Mammoth, Wyoming · 15180 days ago · 12 km deep · 85 km away
- 1.921 km SSW of Mammoth, Wyoming · 15180 days ago · 11 km deep · 86 km away
- 1.620 km SSW of Mammoth, Wyoming · 15179 days ago · 6 km deep · 86 km away
- 1.620 km SSW of Mammoth, Wyoming · 15179 days ago · 5 km deep · 88 km away
Before
Earthquakes todayMontana earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002ap2. Read Tue, Sep 22, 2026, 5:23 PM UTC.