QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

14 km NNW of Summit Park, Utah

· 10 km deep · released about 420 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Morgan County 26 kmSalt Lake County 31 kmWeber County 48 kmDavis County 49 kmSummit County 58 kmWasatch County 73 kmUtah County 83 kmRich County 92 kmCache County 97 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.8 (ml)
Depth
10 km below the surface
Felt
282 reports · strongest reported intensity III
Nearest
Morgan County, 26 km NNE
Nearest mapped fault
Main Canyon fault, 9 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2818 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 282 people have reported feeling it to USGS.

How big was it?

This earthquake released about 420 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 36,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 26,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.3× the energy of this one
  4. This earthquake M 2.8 about 420 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 40.8672, -111.6633. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Morgan County, UT 26 km (16 mi) SSW of here earthquakes near Morgan County
Salt Lake County, UT 31 km (19 mi) NE of here earthquakes near Salt Lake County
Weber County, UT 48 km (30 mi) SSE of here earthquakes near Weber County
Davis County, UT 49 km (30 mi) ESE of here earthquakes near Davis County
Summit County, UT 58 km (36 mi) W of here earthquakes near Summit County
Wasatch County, UT 73 km (45 mi) NW of here earthquakes near Wasatch County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

39 earthquakes have been recorded within 50 km since this one.

  1. 4.0 4 km NNE of Magna, Utah
  2. 3.9 4 km NNE of Magna, Utah
  3. 5.7 5 km NNE of Magna, Utah
  4. 2.4 21 km ENE of Echo, Utah
  5. 2.1 8 km SSW of Henefer, Utah
  6. 2.0 9 km SSW of Henefer, Utah
  7. 1.9 13 km SW of Echo, Utah
  8. 1.8 2 km WNW of Snyderville, Utah
  9. 2.2 3 km E of Enterprise, Utah
  10. 1.8 5 km ESE of Morgan, Utah
  11. 1.6 5 km ESE of Morgan, Utah
  12. 1.6 5 km ESE of Morgan, Utah
  13. 1.6 21 km N of Henefer, Utah
  14. 1.7 5 km W of Salt Lake City, Utah
  15. 1.8 2 km S of Bluffdale, Utah

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.