QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

Utah

· 6.6 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Morgan County 30 kmSummit County 40 kmRich County 51 kmWeber County 55 kmUinta County 58 kmCache County 76 kmSalt Lake County 80 kmDavis County 82 kmWasatch County 93 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
6.6 km below the surface
Felt
no reports yet
Nearest
Morgan County, 30 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1210 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 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× 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 41.1680, -111.2355. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Morgan County, UT 30 km (19 mi) ENE of here earthquakes near Morgan County
Summit County, UT 40 km (25 mi) NW of here earthquakes near Summit County
Rich County, UT 51 km (32 mi) S of here earthquakes near Rich County
Weber County, UT 55 km (34 mi) ESE of here earthquakes near Weber County
Uinta County, WY 58 km (36 mi) WSW of here earthquakes near Uinta County
Cache County, UT 76 km (47 mi) SE of here earthquakes near Cache County

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

Aftershocks so far

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

  1. 1.6 43 km NE of Samak, Utah
  2. 1.6 18 km N of Henefer, Utah
  3. 1.7 2 km ESE of Echo, Utah
  4. 2.1 42 km ENE of Oakley, Utah
  5. 2.7 41 km ENE of Oakley, Utah
  6. 2.2 42 km ENE of Oakley, Utah
  7. 1.9 41 km SSE of Evanston, Wyoming
  8. 3.0 41 km SSE of Evanston, Wyoming
  9. 2.0 43 km NE of Samak, Utah
  10. 1.6 42 km NE of Samak, Utah
  11. 2.0 42 km ENE of Oakley, Utah
  12. 4.7 40 km S of Evanston, Wyoming
  13. 2.4 42 km SSE of Evanston, Wyoming
  14. 3.3 13 km E of Huntsville, Utah
  15. 1.9 7 km NE of Huntsville, 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.