Idaho earthquakes

M1.8 earthquake 12 km WSW of Georgetown, Idaho

A magnitude 1.8 earthquake struck 12 km WSW of Georgetown, Idaho on Sat, Dec 11, 2021, 2:20 AM MST (09:20 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M2.2 9 km NNW of Grace, Idaho. 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 (ML, local (Richter)), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
2021-12-11 09:20:18 UTC
Depth
8.9 km (5.6 mi), shallow
Epicenter
42.430° N, 111.506° 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
Magnitude uncertainty
±0.34
Depth from
From location
Station coverage gap
143°
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: 10 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 2.08 km E of Grace, Idaho · 1752 days ago · 2 km deep · 18 km away
  2. 2.29 km NNW of Grace, Idaho · 1750 days ago · 5 km deep · 33 km away · felt by 2
  3. 1.922 km SSW of Irwin, Idaho · 1747 days ago · 5 km deep · 88 km away
  4. 1.99 km NNW of Georgetown, Idaho · 1746 days ago · 9 km deep · 17 km away
  5. 1.714 km NNW of Georgetown, Idaho · 1744 days ago · 13 km deep · 21 km away
  6. 1.812 km N of Georgetown, Idaho · 1722 days ago · 3 km deep · 22 km away
  7. 1.814 km ESE of Richmond, Utah · 1720 days ago · 6 km deep · 63 km away
  8. 2.110 km ENE of Bennington, Idaho · 1714 days ago · 9 km deep · 24 km away
  9. 1.612 km ENE of Paradise, Utah · 1705 days ago · 11 km deep · 93 km away
  10. 2.218 km WSW of Alpine Northwest, Wyoming · 1698 days ago · 3 km deep · 78 km away

Before

  1. 1.616 km ENE of Georgetown, Idaho · 1784 days ago · 6 km deep · 29 km away
  2. 1.93 km N of Amalga, Utah · 1784 days ago · 2 km deep · 68 km away
  3. 1.516 km W of Garden, Utah · 1786 days ago · 4 km deep · 62 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60471497. Read Sun, Oct 4, 2026, 3:35 AM UTC.