Utah earthquakes

M1.8 earthquake 18 km NNW of Magna, Utah

A magnitude 1.8 earthquake struck 18 km NNW of Magna, Utah on Wed, Aug 18, 2021, 7:23 PM MDT (01:23 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.6 5 km SSW of Thatcher, Utah. This one was a foreshock.

Magna 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 (ML, local (Richter)), micro
Magnitude from
University of Utah Seismograph Stations
Local time
UTC
2021-08-19 01:23:50 UTC
Depth
3.0 km (1.8 mi), shallow
Epicenter
40.859° N, 112.190° 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 0.3 km horizontally, 1.3 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
60°
Stations used
35

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 1.712 km ESE of Millville, Utah · 1864 days ago · 5 km deep · 98 km away
  2. 1.94 km E of Huntsville, Utah · 1862 days ago · 12 km deep · 61 km away
  3. 2.24 km E of Huntsville, Utah · 1862 days ago · 12 km deep · 60 km away
  4. 1.63 km E of Magna, Utah · 1860 days ago · 8 km deep · 20 km away
  5. 1.965 km W of Hooper, Utah · 1858 days ago · 1 km deep · 68 km away
  6. 2.65 km SSW of Thatcher, Utah · 1848 days ago · 4 km deep · 89 km away · felt by 2
  7. 1.54 km SSW of Thatcher, Utah · 1847 days ago · 7 km deep · 89 km away
  8. 2.15 km SSW of Thatcher, Utah · 1847 days ago · 6 km deep · 89 km away
  9. 2.25 km SSW of Thatcher, Utah · 1847 days ago · 5 km deep · 88 km away
  10. 2.35 km SSW of Thatcher, Utah · 1847 days ago · 6 km deep · 89 km away
  11. 1.62 km WNW of West Point, Utah · 1835 days ago · 9 km deep · 31 km away

Before

  1. 2.442 km SW of Howell, Utah · 1890 days ago · 11 km deep · 96 km away
  2. 2.341 km WSW of Howell, Utah · 1890 days ago · 10 km deep · 100 km away
  3. 1.53 km ENE of Huntsville, Utah · 1897 days ago · 14 km deep · 60 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60453827. Read Sat, Oct 3, 2026, 2:04 PM UTC.