Utah earthquakes

M2.3 earthquake 8 km NNE of Sunnyside, Utah

A magnitude 2.3 earthquake struck 8 km NNE of Sunnyside, Utah on Sun, Apr 21, 1985, 12:34 PM MST (19:34 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.7 11 km ENE of Kenilworth, 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
2.3 (Md, duration), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
1985-04-21 19:34:54 UTC
Depth
3.4 km (2.1 mi), shallow
Epicenter
39.627° N, 110.360° 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 2.7 km horizontally, 2.3 km in depth
Depth from
From location
Station coverage gap
244°, poorly surrounded by stations
Stations used
11

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 3 in the 30 days before it.

After

  1. 1.93 km ENE of Sunnyside, Utah · 15135 days ago · 26 km deep · 6 km away
  2. 2.38 km NNE of Sunnyside, Utah · 15133 days ago · 0 km deep · 1 km away
  3. 1.612 km NW of Orangeville, Utah · 15132 days ago · 9 km deep · 77 km away
  4. 2.47 km NNE of Sunnyside, Utah · 15125 days ago · 3 km deep · 1 km away
  5. 2.27 km N of Sunnyside, Utah · 15122 days ago · 3 km deep · 3 km away
  6. 2.47 km NNE of Sunnyside, Utah · 15122 days ago · 7 km deep · 1 km away
  7. 2.48 km NNE of Sunnyside, Utah · 15122 days ago · 4 km deep · 0 km away
  8. 2.29 km WNW of Orangeville, Utah · 15120 days ago · 22 km deep · 81 km away
  9. 2.38 km NNE of Sunnyside, Utah · 15115 days ago · 5 km deep · 0 km away
  10. 2.59 km NNE of Sunnyside, Utah · 15109 days ago · 3 km deep · 2 km away
  11. 2.112 km NE of Sunnyside, Utah · 15108 days ago · 9 km deep · 7 km away
  12. 2.77 km NNE of Sunnyside, Utah · 15099 days ago · -2 km deep · 1 km away
  13. 2.59 km ENE of Kenilworth, Utah · 15097 days ago · 4 km deep · 30 km away
  14. 2.711 km ENE of Kenilworth, Utah · 15096 days ago · 4 km deep · 29 km away
  15. 2.66 km ENE of Sunnyside, Utah · 15092 days ago · 3 km deep · 7 km away
  16. 2.39 km N of Sunnyside, Utah · 15087 days ago · 4 km deep · 3 km away
  17. 2.19 km NNE of Sunnyside, Utah · 15084 days ago · 4 km deep · 1 km away

Before

  1. 1.78 km NW of East Carbon City, Utah · 15141 days ago · -3 km deep · 10 km away
  2. 2.510 km NW of Helper, Utah · 15150 days ago · 3 km deep · 52 km away
  3. 2.88 km NNE of Sunnyside, Utah · 15155 days ago · 3 km deep · 1 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu50021145. Read Thu, Oct 1, 2026, 8:28 PM UTC.