Utah earthquakes

M1.6 earthquake 13 km SE of Mapleton, Utah

A magnitude 1.6 earthquake struck 13 km SE of Mapleton, Utah on Fri, Jul 20, 1984, 9:00 AM MDT (15:00 UTC), -3 km (-2 mi) below the surface.

A larger quake followed: M1.8 11 km SSW of Summit Park, UT. This one was a foreshock.

Mapleton 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
1.6 (md), micro
Local time
UTC
1984-07-20 15:00:58 UTC
Depth
-3.0 km (-1.8 mi), shallow
Epicenter
40.032° N, 111.484° 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 1.3 km horizontally, 4.5 km in depth
Depth from
From location
Station coverage gap
101°
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: 16 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.811 km SSW of Summit Park, UT · 15404 days ago · 10 km deep · 90 km away
  2. 2.14 km SW of Bingham Canyon, Utah · 15404 days ago · 3 km deep · 80 km away
  3. 1.69 km N of Scipio, Utah · 15398 days ago · -3 km deep · 94 km away
  4. 1.89 km N of Scipio, Utah · 15392 days ago · -1 km deep · 94 km away
  5. 1.64 km SW of Bingham Canyon, Utah · 15392 days ago · 2 km deep · 79 km away
  6. 1.77 km N of Kenilworth, Utah · 15389 days ago · -1 km deep · 65 km away
  7. 1.79 km NW of Levan, Utah · 15380 days ago · 0 km deep · 60 km away
  8. 1.99 km N of Scipio, Utah · 15379 days ago · -3 km deep · 94 km away
  9. 3.718 km SSW of Levan, Utah · 15378 days ago · 8 km deep · 80 km away
  10. 1.819 km SSW of Levan, Utah · 15377 days ago · 9 km deep · 81 km away
  11. 2.915 km NW of Orangeville, Utah · 15365 days ago · 3 km deep · 82 km away
  12. 1.912 km NW of Orangeville, Utah · 15364 days ago · 7 km deep · 85 km away
  13. 1.59 km S of Levan, Utah · 15358 days ago · -2 km deep · 70 km away
  14. 2.67 km WNW of Magna, Utah · 15358 days ago · 4 km deep · 98 km away
  15. 1.711 km NW of Orangeville, Utah · 15357 days ago · 3 km deep · 87 km away
  16. 2.313 km NW of Orangeville, Utah · 15345 days ago · 6 km deep · 85 km away

Before

  1. 1.64 km SW of Bingham Canyon, Utah · 15421 days ago · 2 km deep · 80 km away
  2. 1.94 km WSW of Bingham Canyon, Utah · 15422 days ago · 1 km deep · 82 km away
  3. 1.712 km NW of Fayette, Utah · 15427 days ago · 6 km deep · 91 km away
  4. 2.19 km NNW of Orangeville, Utah · 15428 days ago · 2 km deep · 87 km away
  5. 1.812 km SW of Echo, Utah · 15428 days ago · 9 km deep · 97 km away
  6. 1.512 km SW of Echo, Utah · 15428 days ago · 9 km deep · 97 km away
  7. 1.83 km SSW of Bingham Canyon, Utah · 15435 days ago · 3 km deep · 79 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu50015095. Read Wed, Sep 23, 2026, 4:13 AM UTC.