QuakeIndex

quarry blast · reviewed by a seismologist

M 2.9ml

Utah

· -2.0 km deep · released about 610 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salt Lake County 27 kmDavis County 59 kmUtah County 60 kmTooele County 81 kmMorgan County 82 kmWasatch County 87 kmWeber County 88 kmJuab County 103 kmSummit County 109 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 2.9 (ml)
Depth
-2.0 km below the surface
Felt
8 reports · strongest reported intensity III
Nearest
Salt Lake County, 27 km NE
Nearest mapped fault
Oquirrh fault, 5 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 3328 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 8 people have reported feeling it to USGS.

USGS catalogues this as quarry blast, not an earthquake.

How big was it?

This earthquake released about 610 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 25,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 18,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.6× the energy of this one
  4. This earthquake M 2.9 about 610 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 40.5085, -112.1662. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Salt Lake County, UT 27 km (17 mi) SW of here earthquakes near Salt Lake County
Davis County, UT 59 km (37 mi) S of here earthquakes near Davis County
Utah County, UT 60 km (37 mi) NW of here earthquakes near Utah County
Tooele County, UT 81 km (50 mi) E of here earthquakes near Tooele County
Morgan County, UT 82 km (51 mi) SW of here earthquakes near Morgan County
Wasatch County, UT 87 km (54 mi) WNW of here earthquakes near Wasatch County

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

Aftershocks so far

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

  1. 1.7 5 km W of Salt Lake City, Utah
  2. 1.9 3 km SSW of Bluffdale, Utah
  3. 2.2 2 km SSW of Bluffdale, Utah
  4. 2.2 3 km SSW of Bluffdale, Utah
  5. 2.3 3 km SSW of Bluffdale, Utah
  6. 1.8 5 km SSW of Bingham Canyon, Utah
  7. 1.6 2 km SSE of Bluffdale, Utah
  8. 2.3 2 km S of Bluffdale, Utah
  9. 2.5 2 km S of Bluffdale, Utah
  10. 1.8 2 km S of Bluffdale, Utah
  11. 1.5 2 km S of Bluffdale, Utah
  12. 1.6 1 km SSE of Bluffdale, Utah
  13. 1.6 1 km SSE of Bluffdale, Utah
  14. 1.6 1 km SSE of Bluffdale, Utah
  15. 1.7 1 km SE 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

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