QuakeIndex

mining explosion · reviewed by a seismologist

M 2.1ml

6 km SW of Herriman, Utah

· 0.0 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salt Lake County 26 kmUtah County 52 kmDavis County 64 kmWasatch County 79 kmMorgan County 81 kmTooele County 89 kmWeber County 91 kmSummit County 103 kmJuab County 104 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 2.1 (ml)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Salt Lake County, 26 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1776 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as mining explosion, not an earthquake.

How big was it?

This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 40.4686, -112.0742. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Salt Lake County, UT 26 km (16 mi) SSW of here earthquakes near Salt Lake County
Utah County, UT 52 km (32 mi) NW of here earthquakes near Utah County
Davis County, UT 64 km (40 mi) S of here earthquakes near Davis County
Wasatch County, UT 79 km (49 mi) W of here earthquakes near Wasatch County
Morgan County, UT 81 km (50 mi) SSW of here earthquakes near Morgan County
Tooele County, UT 89 km (55 mi) E of here earthquakes near Tooele County

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

Aftershocks so far

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

  1. 3.5 6 km WNW of Lehi, Utah
  2. 1.7 6 km WNW of Lehi, Utah
  3. 1.6 5 km NE of Magna, Utah
  4. 2.0 7 km NNW of Saratoga Springs, Utah
  5. 1.6 6 km WNW of Lehi, Utah
  6. 1.6 7 km WNW of Lehi, Utah
  7. 1.8 3 km WSW of Bluffdale, Utah
  8. 1.8 1 km SE of Bluffdale, Utah
  9. 1.7 3 km ENE of Magna, Utah
  10. 1.8 2 km ENE of Saratoga Springs, Utah
  11. 1.6 2 km SE of North Salt Lake, Utah
  12. 1.5 6 km NE of Magna, Utah
  13. 2.1 5 km SE of Snowbird, Utah
  14. 1.6 7 km SW of Vineyard, 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 250,000 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.