Idaho earthquakes

M1.8 earthquake 10 km W of Bennington, Idaho

A magnitude 1.8 earthquake struck 10 km W of Bennington, Idaho on Thu, Jan 10, 1985, 9:26 AM MST (16:26 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.6 9 km ENE of Star Valley Ranch, Wyoming. This one was a foreshock.

Montpelier forecastMore in Idaho

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.8 (Md, duration), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
1985-01-10 16:26:55 UTC
Depth
3.3 km (2.1 mi), shallow
Epicenter
42.401° N, 111.449° 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 1.5 km horizontally, 16.4 km in depth
Depth from
From location
Station coverage gap
180°
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: 14 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 2.316 km N of Howell, Utah · 15226 days ago · 3 km deep · 97 km away
  2. 1.63 km NE of Oxford, Idaho · 15220 days ago · 1 km deep · 46 km away
  3. 2.113 km W of Portage, Utah · 15216 days ago · 5 km deep · 92 km away
  4. 1.614 km W of Portage, Utah · 15215 days ago · 4 km deep · 92 km away
  5. 2.013 km W of Portage, Utah · 15213 days ago · 6 km deep · 92 km away
  6. 2.11 km W of Bennington, Idaho · 15203 days ago · 12 km deep · 9 km away
  7. 2.513 km SSW of Grace, Idaho · 15196 days ago · 10 km deep · 31 km away
  8. 3.511 km E of Star Valley Ranch, Wyoming · 15192 days ago · 1 km deep · 83 km away
  9. 3.113 km E of Star Valley Ranch, Wyoming · 15192 days ago · 0 km deep · 84 km away
  10. 3.419 km ENE of Star Valley Ranch, Wyoming · 15184 days ago · 5 km deep · 91 km away
  11. 2.913 km E of Star Valley Ranch, Wyoming · 15181 days ago · 0 km deep · 85 km away
  12. 2.415 km ENE of Star Valley Ranch, Wyoming · 15181 days ago · 1 km deep · 87 km away
  13. 3.69 km ENE of Star Valley Ranch, Wyoming · 15181 days ago · 6 km deep · 84 km away
  14. 2.613 km E of Star Valley Ranch, Wyoming · 15181 days ago · 0 km deep · 84 km away

Before

  1. 1.63 km WNW of Deweyville, Utah · 15246 days ago · 4 km deep · 94 km away
  2. 1.912 km ESE of Providence, Utah · 15259 days ago · 0 km deep · 82 km away
  3. 1.92 km SSE of Randolph, Utah · 15259 days ago · -3 km deep · 87 km away
  4. 2.118 km ENE of Snowville, Utah · 15262 days ago · 8 km deep · 96 km away
  5. 1.917 km N of Howell, Utah · 15264 days ago · 6 km deep · 98 km away
  6. 1.619 km ENE of Snowville, Utah · 15266 days ago · 7 km deep · 96 km away
  7. 1.818 km ENE of Snowville, Utah · 15266 days ago · 2 km deep · 96 km away
  8. 1.914 km W of Georgetown, Idaho · 15270 days ago · 0 km deep · 10 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu50018400. Read Sat, Oct 3, 2026, 12:57 PM UTC.