QuakeIndex

quarry blast · reviewed by a seismologist

M 1.8ml

3 km WSW of Bluffdale, Utah

· -2.0 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salt Lake County 22 kmUtah County 48 kmDavis County 65 kmWasatch County 71 kmMorgan County 76 kmWeber County 89 kmSummit County 96 kmTooele County 97 kmJuab 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 1.8 (ml)
Depth
-2.0 km below the surface
Felt
5 reports · strongest reported intensity IV
Nearest
Salt Lake County, 22 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 372 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 5 people have reported feeling it to USGS.

USGS catalogues this as quarry blast, not an earthquake.

How big was it?

This earthquake released about 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× the energy of this one
  4. This earthquake M 1.8 about 13 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 40.4775, -111.9787. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Salt Lake County, UT 22 km (13 mi) SSW of here earthquakes near Salt Lake County
Utah County, UT 48 km (30 mi) NNW of here earthquakes near Utah County
Davis County, UT 65 km (40 mi) SSE of here earthquakes near Davis County
Wasatch County, UT 71 km (44 mi) WNW of here earthquakes near Wasatch County
Morgan County, UT 76 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

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

  1. 1.0 6 km SSW of Bingham Canyon, Utah
  2. 2.0 6 km WNW of Lehi, Utah
  3. 1.6 5 km SSW of Bingham Canyon, Utah
  4. 2.3 3 km SW of Bingham Canyon, Utah
  5. 1.6 5 km NNW of Saratoga Springs, Utah
  6. 2.9 6 km NNW of Saratoga Springs, Utah
  7. 1.6 6 km NNW of Saratoga Springs, Utah
  8. 1.6 2 km ENE of Summit Park, Utah
  9. 2.2 7 km NNW of Saratoga Springs, Utah
  10. 2.2 5 km ENE of Magna, Utah
  11. 1.7 6 km NW of Saratoga Springs, Utah
  12. 2.1 5 km NW of Summit Park, Utah
  13. 1.8 8 km NW of Saratoga Springs, Utah
  14. 1.7 5 km NE of Magna, Utah
  15. 1.7 5 km ENE 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.7 on 2020-03-18 — it released about 810,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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