QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

1 km SSW of Bluffdale, Utah

· 8.6 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salt Lake County 22 kmUtah County 46 kmDavis County 66 kmWasatch County 69 kmMorgan County 75 kmWeber County 89 kmSummit County 94 kmTooele County 99 kmJuab County 111 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 3.1 (ml)
Depth
8.6 km below the surface
Felt
3,638 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Salt Lake County, 22 km N
Nearest mapped fault
Wasatch fault, 10 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 2697 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3,638 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× more

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 40.4743, -111.9497. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Salt Lake County, UT 22 km (13 mi) S of here earthquakes near Salt Lake County
Utah County, UT 46 km (29 mi) NNW of here earthquakes near Utah County
Davis County, UT 66 km (41 mi) SSE of here earthquakes near Davis County
Wasatch County, UT 69 km (43 mi) WNW of here earthquakes near Wasatch County
Morgan County, UT 75 km (47 mi) SSW of here earthquakes near Morgan County
Weber County, UT 89 km (55 mi) S of here earthquakes near Weber County

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

Aftershocks so far

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

  1. 2.3 7 km NNE of Magna, Utah
  2. 3.5 5 km NNE of Magna, Utah
  3. 1.9 5 km NNE of Magna, Utah
  4. 2.0 6 km NNE of Magna, Utah
  5. 2.4 6 km NE of Magna, Utah
  6. 3.9 6 km NE of Magna, Utah
  7. 3.1 7 km NE of Magna, Utah
  8. 3.1 5 km NE of Magna, Utah
  9. 2.5 6 km NE of Magna, Utah
  10. 2.3 7 km NNE of Magna, Utah
  11. 3.7 4 km N of Magna, Utah
  12. 3.6 4 km N of Magna, Utah
  13. 3.7 6 km NE of Magna, Utah
  14. 2.2 6 km NNE of Magna, Utah
  15. 2.4 6 km NNE 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.