Utah earthquakes

M1.8 earthquake 9 km SSE of Morgan, Utah

A magnitude 1.8 earthquake struck 9 km SSE of Morgan, Utah on Fri, Oct 9, 1987, 6:07 AM MDT (12:07 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.6 11 km ENE of Huntsville, Utah. This one was a foreshock.

Morgan 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
1.8 (Md, duration), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
1987-10-09 12:07:54 UTC
Depth
10.3 km (6.4 mi), shallow
Epicenter
40.958° N, 111.635° 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 0.9 km horizontally, 2.2 km in depth
Depth from
From location
Station coverage gap
174°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.519 km SW of Thatcher, Utah · 14236 days ago · 3 km deep · 95 km away
  2. 2.118 km SW of Thatcher, Utah · 14232 days ago · 8 km deep · 94 km away
  3. 2.018 km SW of Thatcher, Utah · 14224 days ago · 7 km deep · 95 km away
  4. 1.811 km ENE of Huntsville, Utah · 14216 days ago · 12 km deep · 40 km away
  5. 2.611 km ENE of Huntsville, Utah · 14216 days ago · 14 km deep · 40 km away
  6. 1.512 km ENE of Huntsville, Utah · 14207 days ago · 14 km deep · 40 km away
  7. 1.63 km S of Deweyville, Utah · 14207 days ago · 4 km deep · 89 km away
  8. 2.023 km N of Henefer, Utah · 14204 days ago · 6 km deep · 33 km away
  9. 2.25 km W of Snyderville, Utah · 14202 days ago · 11 km deep · 30 km away
  10. 1.622 km W of Randolph, Utah · 14200 days ago · 2 km deep · 76 km away
  11. 1.619 km SW of Thatcher, Utah · 14194 days ago · 0 km deep · 96 km away
  12. 1.61 km SE of Pleasant Grove, Utah · 14189 days ago · 2 km deep · 67 km away
  13. 1.810 km ENE of Avon, Utah · 14186 days ago · 4 km deep · 70 km away

Before

  1. 3.120 km SW of Thatcher, Utah · 14245 days ago · 21 km deep · 95 km away
  2. 2.017 km SW of Thatcher, Utah · 14247 days ago · 6 km deep · 93 km away
  3. 1.818 km SW of Thatcher, Utah · 14247 days ago · 8 km deep · 94 km away
  4. 2.219 km SW of Thatcher, Utah · 14247 days ago · 5 km deep · 95 km away
  5. 3.318 km SW of Thatcher, Utah · 14247 days ago · 7 km deep · 94 km away
  6. 1.718 km SW of Thatcher, Utah · 14247 days ago · 7 km deep · 94 km away
  7. 2.01 km SSE of Charleston, Utah · 14264 days ago · 0 km deep · 58 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu50033940. Read Sun, Oct 4, 2026, 4:49 PM UTC.