Utah earthquakes

M1.8 earthquake 6 km NE of Sunnyside, Utah

A magnitude 1.8 earthquake struck 6 km NE of Sunnyside, Utah on Mon, Oct 7, 1985, 5:45 PM MDT (23:45 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M1.9 15 km WNW of Orangeville, Utah. This one was a foreshock.

East Carbon City 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
1.8 (md), micro
Local time
UTC
1985-10-07 23:45:09 UTC
Depth
4.7 km (2.9 mi), shallow
Epicenter
39.600° N, 110.337° 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 3.0 km horizontally, 1.7 km in depth
Depth from
From location
Station coverage gap
249°, poorly surrounded by stations
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: 9 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 1.915 km WNW of Orangeville, Utah · 14959 days ago · 6 km deep · 85 km away
  2. 2.59 km N of Sunnyside, Utah · 14956 days ago · 2 km deep · 6 km away
  3. 2.0Utah · 14952 days ago · 7 km deep · 26 km away
  4. 2.410 km NNW of East Carbon City, Utah · 14950 days ago · 4 km deep · 12 km away
  5. 2.58 km NNE of Sunnyside, Utah · 14941 days ago · 2 km deep · 3 km away
  6. 2.414 km S of Independence, Utah · 14924 days ago · 7 km deep · 100 km away
  7. 2.77 km N of Sunnyside, Utah · 14912 days ago · 6 km deep · 5 km away
  8. 2.521 km E of Kenilworth, Utah · 14909 days ago · 8 km deep · 23 km away
  9. 2.51 km SSW of Scofield, Utah · 14903 days ago · 7 km deep · 72 km away

Before

  1. 2.67 km N of East Carbon City, Utah · 14961 days ago · -1 km deep · 8 km away
  2. 2.117 km WNW of Orangeville, Utah · 14965 days ago · 8 km deep · 86 km away
  3. 2.89 km NNE of Sunnyside, Utah · 14968 days ago · 3 km deep · 4 km away
  4. 2.313 km NW of Orangeville, Utah · 14971 days ago · 2 km deep · 80 km away
  5. 2.68 km N of Sunnyside, Utah · 14973 days ago · 5 km deep · 6 km away
  6. 1.912 km WNW of Orangeville, Utah · 14974 days ago · 11 km deep · 82 km away
  7. 2.67 km N of East Carbon City, Utah · 14974 days ago · 0 km deep · 8 km away
  8. 2.35 km N of East Carbon City, Utah · 14978 days ago · 4 km deep · 7 km away
  9. 2.66 km N of East Carbon City, Utah · 14985 days ago · 2 km deep · 7 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu50024585. Read Tue, Sep 22, 2026, 11:20 AM UTC.