Utah earthquakes

M1.7 earthquake 7 km WSW of Thatcher, Utah

A magnitude 1.7 earthquake struck 7 km WSW of Thatcher, Utah on Sun, Sep 22, 1985, 10:48 PM MDT (04:48 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M2.7 16 km SE of Avon, Utah. This one was a foreshock.

Thatcher forecastMore in Utah

Map

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

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The earthquake

Magnitude
1.7 (md), micro
Local time
UTC
1985-09-23 04:48:31 UTC
Depth
0.6 km (0.3 mi), shallow
Epicenter
41.671° N, 112.379° W
Region
Utah
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 0.7 km horizontally, 1.8 km in depth
Depth from
From location
Station coverage gap
106°
Stations used
12

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 2.78 km W of Thatcher, Utah · 14980 days ago · 6 km deep · 2 km away
  2. 2.08 km SW of Thatcher, Utah · 14980 days ago · 4 km deep · 2 km away
  3. 2.313 km ESE of Snowville, Utah · 14980 days ago · 5 km deep · 33 km away
  4. 1.613 km NNW of Howell, Utah · 14979 days ago · 13 km deep · 29 km away
  5. 1.813 km ESE of Snowville, Utah · 14977 days ago · 2 km deep · 33 km away
  6. 1.612 km E of Snowville, Utah · 14976 days ago · -2 km deep · 34 km away
  7. 1.813 km ESE of Snowville, Utah · 14976 days ago · 4 km deep · 33 km away
  8. 2.113 km E of Snowville, Utah · 14975 days ago · 7 km deep · 33 km away
  9. 1.713 km E of Snowville, Utah · 14974 days ago · 1 km deep · 34 km away
  10. 2.53 km WSW of Wellsville, Utah · 14971 days ago · 3 km deep · 34 km away
  11. 1.826 km SSW of Snowville, Utah · 14971 days ago · 6 km deep · 35 km away
  12. 1.914 km E of Snowville, Utah · 14969 days ago · 1 km deep · 34 km away
  13. 1.68 km NNW of Henefer, Utah · 14957 days ago · 7 km deep · 96 km away
  14. 2.716 km SE of Avon, Utah · 14953 days ago · 2 km deep · 65 km away
  15. 2.126 km SSW of Snowville, Utah · 14953 days ago · 9 km deep · 36 km away
  16. 2.125 km SSW of Snowville, Utah · 14951 days ago · 8 km deep · 37 km away
  17. 1.726 km SSW of Snowville, Utah · 14950 days ago · 8 km deep · 38 km away

Before

  1. 1.715 km S of Snowville, Utah · 14996 days ago · 6 km deep · 31 km away
  2. 1.818 km E of Snowville, Utah · 14998 days ago · 3 km deep · 34 km away
  3. 1.812 km SSW of Malad City, Idaho · 14998 days ago · 1 km deep · 47 km away
  4. 1.712 km S of Snowville, Utah · 15008 days ago · 10 km deep · 35 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu50024225. Read Tue, Sep 29, 2026, 10:45 PM UTC.