QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

19 km NNW of Grantsville, Utah

· 3.9 km deep · released about 420 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Davis County 45 kmTooele County 55 kmSalt Lake County 56 kmWeber County 83 kmMorgan County 93 kmUtah County 104 kmBox Elder County 105 kmJuab County 116 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
3.9 km below the surface
Felt
4 reports · strongest reported intensity II
Nearest
Davis County, 45 km NE
Nearest mapped fault
Skull Valley (mid-valley) faults, 6 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. 4 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 40.7468, -112.5813. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Davis County, UT 45 km (28 mi) SW of here earthquakes near Davis County
Tooele County, UT 55 km (34 mi) NE of here earthquakes near Tooele County
Salt Lake County, UT 56 km (35 mi) W of here earthquakes near Salt Lake County
Weber County, UT 83 km (52 mi) SW of here earthquakes near Weber County
Morgan County, UT 93 km (58 mi) WSW of here earthquakes near Morgan County
Utah County, UT 104 km (65 mi) NW of here earthquakes near Utah County

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

Aftershocks so far

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

  1. 1.7 Utah
  2. 2.1 5 km NNE of Magna, Utah
  3. 2.1 6 km NNE of Magna, Utah
  4. 2.1 6 km NNE of Magna, Utah
  5. 3.1 1 km NE of Magna, Utah
  6. 1.9 5 km NE of Magna, Utah
  7. 2.2 5 km NE of Magna, Utah
  8. 2.2 3 km NE of Magna, Utah
  9. 1.8 6 km NNE of Magna, Utah
  10. 2.3 6 km NNE of Magna, Utah
  11. 2.0 6 km NE of Magna, Utah
  12. 2.2 3 km NE of Magna, Utah
  13. 1.6 6 km NE of Magna, Utah
  14. 2.0 6 km NE of Magna, Utah
  15. 2.0 5 km NE of Magna, 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.