QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

2 km ENE of Saratoga Springs, Utah

· 10 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Utah County 32 kmSalt Lake County 35 kmWasatch County 61 kmDavis County 81 kmMorgan County 86 kmSummit County 96 kmWeber County 102 kmJuab County 105 kmTooele County 106 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
10 km below the surface
Felt
no reports yet
Nearest
Utah County, 32 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 545 days ago

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

How big was it?

This earthquake released about 16 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 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 40.3535, -111.8817. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Utah County, UT 32 km (20 mi) NW of here earthquakes near Utah County
Salt Lake County, UT 35 km (22 mi) S of here earthquakes near Salt Lake County
Wasatch County, UT 61 km (38 mi) W of here earthquakes near Wasatch County
Davis County, UT 81 km (50 mi) SSE of here earthquakes near Davis County
Morgan County, UT 86 km (53 mi) SSW of here earthquakes near Morgan County
Summit County, UT 96 km (60 mi) SW of here earthquakes near Summit County

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

Aftershocks so far

35 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. 1.8 5 km E of Heber City, 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. 1.8 8 km NW of Saratoga Springs, Utah
  13. 1.7 5 km NE of Magna, Utah
  14. 1.7 5 km ENE of Magna, Utah
  15. 1.9 6 km WNW of Lehi, 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 680,000 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.