Utah earthquakes

M2.5 earthquake 11 km SSW of Henefer, Utah

A magnitude 2.5 earthquake struck 11 km SSW of Henefer, Utah on Sat, Sep 8, 2018, 9:52 PM MDT (03:52 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M2.8 14 km NNW of Summit Park, Utah. This one was a foreshock.

Henefer 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
2.5 (ml), micro
Local time
UTC
2018-09-09 03:52:48 UTC
Depth
7.0 km (4.4 mi), shallow
Epicenter
40.929° N, 111.573° W
Region
Utah
Felt reports
1
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.3 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
34°
Stations used
41

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 2.411 km SSW of Henefer, Utah · 2944 days ago · 9 km deep · 0 km away
  2. 1.514 km NNW of Henefer, Utah · 2937 days ago · 12 km deep · 24 km away
  3. 2.014 km ESE of Huntsville, Utah · 2929 days ago · 9 km deep · 31 km away
  4. 1.616 km N of Summit Park, Utah · 2922 days ago · 7 km deep · 5 km away
  5. 1.63 km NNW of Saratoga Springs, Utah · 2906 days ago · 1 km deep · 68 km away
  6. 1.613 km NNW of Summit Park, Utah · 2899 days ago · 10 km deep · 10 km away
  7. 2.814 km NNW of Summit Park, Utah · 2899 days ago · 10 km deep · 10 km away · felt by 282
  8. 2.220 km NNW of Grantsville, Utah · 2898 days ago · 6 km deep · 88 km away
  9. 2.819 km NNW of Grantsville, Utah · 2898 days ago · 4 km deep · 87 km away · felt by 4
  10. 1.820 km NNW of Grantsville, Utah · 2898 days ago · 5 km deep · 87 km away
  11. 1.620 km NNW of Grantsville, Utah · 2897 days ago · 7 km deep · 88 km away
  12. 1.820 km NW of Grantsville, Utah · 2893 days ago · 5 km deep · 89 km away
  13. 1.718 km SSE of Independence, Utah · 2892 days ago · 6 km deep · 93 km away
  14. 1.55 km NNE of Morgan, Utah · 2890 days ago · 7 km deep · 19 km away

Before

  1. 2.110 km ESE of Randolph, Utah · 2958 days ago · -1 km deep · 90 km away
  2. 1.63 km SW of West Point, Utah · 2970 days ago · 9 km deep · 49 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uu60295982 (also filed as us2000hbc9). Read Wed, Sep 30, 2026, 11:15 PM UTC.