Utah earthquakes

M2.1 earthquake 8 km NW of Helper, Utah

A magnitude 2.1 earthquake struck 8 km NW of Helper, Utah on Fri, Jun 5, 1987, 9:38 PM MDT (03:38 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M2.9 5 km N of Helper, Utah. This one was a foreshock.

Helper 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
2.1 (Md, duration), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
1987-06-06 03:38:52 UTC
Depth
1.6 km (1.0 mi), shallow
Epicenter
39.751° N, 110.914° 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 0.7 km horizontally, 15.1 km in depth
Depth from
From location
Station coverage gap
108°
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: 9 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 2.84 km N of Sunnyside, Utah · 14363 days ago · 4 km deep · 48 km away
  2. 2.318 km WNW of Emery, Utah · 14362 days ago · 4 km deep · 97 km away
  3. 2.68 km WNW of Hiawatha, Utah · 14361 days ago · 6 km deep · 30 km away
  4. 2.26 km W of Hiawatha, Utah · 14361 days ago · 14 km deep · 32 km away
  5. 1.619 km E of Mayfield, Utah · 14354 days ago · 9 km deep · 85 km away
  6. 1.54 km E of Heber City, Utah · 14351 days ago · 7 km deep · 92 km away
  7. 2.95 km N of Helper, Utah · 14325 days ago · 1 km deep · 6 km away
  8. 2.68 km NW of Helper, Utah · 14306 days ago · 2 km deep · 2 km away
  9. 2.09 km NW of Helper, Utah · 14306 days ago · 3 km deep · 0 km away

Before

  1. 2.88 km NW of Helper, Utah · 14367 days ago · 6 km deep · 1 km away
  2. 1.518 km NNW of Fayette, Utah · 14376 days ago · 14 km deep · 95 km away
  3. 2.25 km ESE of Heber City, Utah · 14384 days ago · 7 km deep · 90 km away
  4. 2.34 km E of Heber City, Utah · 14388 days ago · 8 km deep · 92 km away
  5. 1.827 km ESE of Woodland Hills, Utah · 14390 days ago · 4 km deep · 42 km away
  6. 2.3Utah · 14390 days ago · 13 km deep · 50 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu50032705. Read Sat, Oct 3, 2026, 2:46 PM UTC.