Utah earthquakes

M1.8 earthquake 8 km ENE of Avon, Utah

A magnitude 1.8 earthquake struck 8 km ENE of Avon, Utah on Fri, May 15, 1987, 1:32 PM MDT (19:32 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.2 9 km ENE of Howell, 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
1.8 (md), micro
Local time
UTC
1987-05-15 19:32:41 UTC
Depth
4.8 km (3.0 mi), shallow
Epicenter
41.559° N, 111.724° 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 0.8 km horizontally, 2.1 km in depth
Depth from
From location
Station coverage gap
50°
Stations used
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 16 in the 30 days before it.

After

  1. 2.29 km ENE of Howell, Utah · 14365 days ago · 6 km deep · 58 km away
  2. 2.111 km SSE of Snowville, Utah · 14348 days ago · 5 km deep · 85 km away
  3. 1.613 km NW of Howell, Utah · 14334 days ago · 6 km deep · 77 km away
  4. 2.010 km ENE of Howell, Utah · 14329 days ago · 6 km deep · 59 km away
  5. 1.810 km ENE of Howell, Utah · 14325 days ago · 6 km deep · 59 km away
  6. 1.89 km WNW of Summit Park, Utah · 14319 days ago · 3 km deep · 86 km away

Before

  1. 1.611 km ENE of Howell, Utah · 14380 days ago · 4 km deep · 59 km away
  2. 1.710 km ENE of Howell, Utah · 14380 days ago · 5 km deep · 60 km away
  3. 1.810 km ENE of Howell, Utah · 14385 days ago · 4 km deep · 58 km away
  4. 1.812 km SSE of Snowville, Utah · 14386 days ago · 1 km deep · 84 km away
  5. 2.613 km SSE of Snowville, Utah · 14394 days ago · 6 km deep · 85 km away
  6. 2.412 km SSE of Snowville, Utah · 14394 days ago · 5 km deep · 85 km away
  7. 2.713 km W of Portage, Utah · 14396 days ago · 7 km deep · 72 km away
  8. 3.112 km SSE of Snowville, Utah · 14396 days ago · 5 km deep · 85 km away
  9. 2.312 km SSE of Snowville, Utah · 14396 days ago · 4 km deep · 83 km away
  10. 1.611 km SSE of Snowville, Utah · 14396 days ago · 1 km deep · 85 km away
  11. 3.212 km SSE of Snowville, Utah · 14397 days ago · 5 km deep · 85 km away
  12. 1.912 km SSE of Snowville, Utah · 14397 days ago · 5 km deep · 85 km away
  13. 1.615 km S of Snowville, Utah · 14402 days ago · 11 km deep · 87 km away
  14. 2.711 km S of Snowville, Utah · 14402 days ago · 10 km deep · 88 km away
  15. 1.711 km E of Howell, Utah · 14404 days ago · 3 km deep · 56 km away
  16. 1.712 km S of Snowville, Utah · 14405 days ago · 6 km deep · 88 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu50032605. Read Tue, Sep 22, 2026, 10:35 PM UTC.