Utah earthquakes

M2.1 earthquake 12 km NE of Sunnyside, Utah

A magnitude 2.1 earthquake struck 12 km NE of Sunnyside, Utah on Tue, May 21, 1985, 2:50 PM MDT (20:50 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M3.1 7 km N of Sunnyside, 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
2.1 (Md, duration), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
1985-05-21 20:50:15 UTC
Depth
9.1 km (5.6 mi), shallow
Epicenter
39.621° N, 110.279° 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 2.4 km horizontally, 1.0 km in depth
Depth from
From location
Station coverage gap
253°, 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: 11 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 2.77 km NNE of Sunnyside, Utah · 15101 days ago · -2 km deep · 8 km away
  2. 2.59 km ENE of Kenilworth, Utah · 15099 days ago · 4 km deep · 37 km away
  3. 2.711 km ENE of Kenilworth, Utah · 15098 days ago · 4 km deep · 35 km away
  4. 2.66 km ENE of Sunnyside, Utah · 15094 days ago · 3 km deep · 6 km away
  5. 2.39 km N of Sunnyside, Utah · 15089 days ago · 4 km deep · 10 km away
  6. 2.19 km NNE of Sunnyside, Utah · 15086 days ago · 4 km deep · 7 km away
  7. 1.917 km ENE of Kenilworth, Utah · 15076 days ago · 6 km deep · 33 km away
  8. 2.95 km NE of Sunnyside, Utah · 15073 days ago · 3 km deep · 6 km away
  9. 3.17 km N of Sunnyside, Utah · 15073 days ago · 4 km deep · 9 km away
  10. 2.67 km NNE of Sunnyside, Utah · 15071 days ago · 4 km deep · 7 km away
  11. 2.89 km N of Sunnyside, Utah · 15053 days ago · 3 km deep · 11 km away

Before

  1. 2.59 km NNE of Sunnyside, Utah · 15111 days ago · 3 km deep · 5 km away
  2. 2.38 km NNE of Sunnyside, Utah · 15117 days ago · 5 km deep · 7 km away
  3. 2.29 km WNW of Orangeville, Utah · 15122 days ago · 22 km deep · 86 km away
  4. 2.48 km NNE of Sunnyside, Utah · 15124 days ago · 4 km deep · 7 km away
  5. 2.47 km NNE of Sunnyside, Utah · 15124 days ago · 7 km deep · 8 km away
  6. 2.27 km N of Sunnyside, Utah · 15124 days ago · 3 km deep · 10 km away
  7. 2.47 km NNE of Sunnyside, Utah · 15127 days ago · 3 km deep · 7 km away
  8. 1.612 km NW of Orangeville, Utah · 15134 days ago · 9 km deep · 83 km away
  9. 2.38 km NNE of Sunnyside, Utah · 15135 days ago · 0 km deep · 6 km away
  10. 1.93 km ENE of Sunnyside, Utah · 15137 days ago · 26 km deep · 8 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu50021730. Read Sat, Oct 3, 2026, 7:45 PM UTC.