Idaho earthquakes

M2.3 earthquake Utah

A magnitude 2.3 earthquake struck in Utah on Mon, Dec 29, 1986, 6:46 PM MST (01:46 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M3.5 10 km ENE of Howell, Utah. This one was a foreshock.

Thatcher 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
2.3 (md), micro
Local time
UTC
1986-12-30 01:46:11 UTC
Depth
7.7 km (4.8 mi), shallow
Epicenter
41.902° N, 112.690° 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 0.9 km horizontally, 1.1 km in depth
Depth from
From location
Station coverage gap
179°
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: 23 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 1.66 km SSE of Snowville, Utah · 14512 days ago · 2 km deep · 1 km away
  2. 3.510 km ENE of Howell, Utah · 14511 days ago · 4 km deep · 32 km away
  3. 1.910 km ENE of Howell, Utah · 14511 days ago · 0 km deep · 31 km away
  4. 1.910 km ENE of Howell, Utah · 14488 days ago · 3 km deep · 32 km away
  5. 2.111 km E of Howell, Utah · 14488 days ago · 0 km deep · 33 km away
  6. 2.04 km NE of Weston, Idaho · 14483 days ago · 2 km deep · 64 km away
  7. 1.610 km WSW of Thatcher, Utah · 14481 days ago · 0 km deep · 38 km away
  8. 2.89 km ENE of Howell, Utah · 14476 days ago · 5 km deep · 31 km away
  9. 2.514 km WSW of Corinne, Utah · 14470 days ago · 19 km deep · 57 km away
  10. 2.315 km WSW of Corinne, Utah · 14470 days ago · 5 km deep · 58 km away
  11. 2.178 km E of Montello, Nevada · 14462 days ago · 6 km deep · 79 km away
  12. 1.917 km WNW of Paris, Idaho · 14462 days ago · 10 km deep · 100 km away
  13. 3.910 km ENE of Howell, Utah · 14455 days ago · 5 km deep · 31 km away
  14. 1.511 km ENE of Howell, Utah · 14455 days ago · 7 km deep · 32 km away
  15. 2.010 km ENE of Howell, Utah · 14455 days ago · 0 km deep · 32 km away
  16. 2.511 km ENE of Howell, Utah · 14455 days ago · 3 km deep · 32 km away
  17. 1.610 km ENE of Howell, Utah · 14455 days ago · 1 km deep · 31 km away
  18. 2.110 km ENE of Howell, Utah · 14455 days ago · 1 km deep · 32 km away
  19. 1.910 km ENE of Howell, Utah · 14455 days ago · 1 km deep · 31 km away
  20. 2.510 km ENE of Howell, Utah · 14454 days ago · 6 km deep · 31 km away
  21. 2.09 km ENE of Howell, Utah · 14454 days ago · 4 km deep · 31 km away
  22. 1.711 km ENE of Howell, Utah · 14454 days ago · 1 km deep · 31 km away
  23. 2.710 km ENE of Howell, Utah · 14453 days ago · 2 km deep · 32 km away

Before

  1. 1.613 km ESE of Snowville, Utah · 14527 days ago · 1 km deep · 11 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu50031090. Read Wed, Sep 23, 2026, 11:02 AM UTC.