Utah earthquakes

M1.8 earthquake 1 km S of Koosharem, Utah

A magnitude 1.8 earthquake struck 1 km S of Koosharem, Utah on Wed, Jun 5, 1985, 6:48 PM MDT (00:48 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M2.7 12 km SE of Manti, Utah. This one was a foreshock.

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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
1985-06-06 00:48:09 UTC
Depth
14.4 km (8.9 mi), shallow
Epicenter
38.493° N, 111.878° 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 1.1 km horizontally, 2.0 km in depth
Depth from
From location
Station coverage gap
141°
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 2.45 km ESE of Fayette, Utah · 15091 days ago · 7 km deep · 79 km away
  2. 2.712 km SE of Manti, Utah · 15087 days ago · 6 km deep · 85 km away
  3. 1.75 km NNE of Gunnison, Utah · 15081 days ago · 7 km deep · 79 km away
  4. 1.710 km NW of Marysvale, Utah · 15074 days ago · 5 km deep · 38 km away
  5. 2.618 km SE of Minersville, Utah · 15037 days ago · 6 km deep · 91 km away

Before

  1. 1.93 km SSE of Koosharem, Utah · 15094 days ago · 6 km deep · 1 km away
  2. 2.01 km SSW of Koosharem, Utah · 15094 days ago · 4 km deep · 1 km away
  3. 2.11 km S of Koosharem, Utah · 15096 days ago · 5 km deep · 0 km away
  4. 1.89 km SSE of Scipio, Utah · 15103 days ago · 2 km deep · 77 km away
  5. 2.122 km ESE of Sterling, Utah · 15114 days ago · 5 km deep · 79 km away
  6. 1.56 km ESE of Redmond, UT · 15120 days ago · 7 km deep · 60 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu50022030. Read Thu, Oct 1, 2026, 6:36 PM UTC.