Utah earthquakes

M2.3 earthquake 11 km SSE of Sunnyside, Utah

A magnitude 2.3 earthquake struck 11 km SSE of Sunnyside, Utah on Thu, Feb 11, 1982, 6:21 AM MST (13:21 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.5 49 km SSW of Bonanza, 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), micro
Local time
UTC
1982-02-11 13:21:21 UTC
Depth
10.1 km (6.3 mi), shallow
Epicenter
39.450° N, 110.350° 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 2.0 km horizontally, 3.0 km in depth
Depth from
From location
Station coverage gap
246°, poorly surrounded by stations
Stations used
9

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 1.64 km WNW of Hiawatha, Utah · 16288 days ago · 15 km deep · 61 km away
  2. 2.549 km SSW of Bonanza, Utah · 16280 days ago · 2 km deep · 80 km away
  3. 2.29 km NW of Helper, Utah · 16272 days ago · 4 km deep · 60 km away
  4. 1.611 km W of Huntington, Utah · 16270 days ago · 8 km deep · 66 km away
  5. 2.16 km WNW of East Carbon City, Utah · 16269 days ago · 8 km deep · 18 km away
  6. 2.520 km E of Kenilworth, Utah · 16261 days ago · 6 km deep · 35 km away
  7. 2.24 km WNW of Hiawatha, Utah · 16251 days ago · 2 km deep · 61 km away
  8. 2.04 km W of Hiawatha, Utah · 16247 days ago · 5 km deep · 62 km away
  9. 1.9Utah · 16243 days ago · 12 km deep · 61 km away
  10. 1.918 km ESE of Mount Pleasant, Utah · 16240 days ago · 4 km deep · 78 km away
  11. 1.913 km NW of Orangeville, Utah · 16240 days ago · 2 km deep · 70 km away
  12. 2.314 km NW of Orangeville, Utah · 16240 days ago · 4 km deep · 70 km away
  13. 1.512 km NW of Orangeville, Utah · 16239 days ago · 3 km deep · 71 km away
  14. 2.55 km ENE of Kenilworth, Utah · 16238 days ago · 3 km deep · 45 km away
  15. 1.82 km SE of Kenilworth, Utah · 16238 days ago · 4 km deep · 44 km away

Before

  1. 2.13 km W of Hiawatha, Utah · 16300 days ago · -2 km deep · 61 km away
  2. 1.912 km W of Huntington, Utah · 16308 days ago · 7 km deep · 66 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu50003775. Read Wed, Sep 23, 2026, 5:06 AM UTC.