QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

10 km ESE of Randolph, Utah

· -1.5 km deep · released about 41 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Rich County 15 kmUinta County 58 kmCache County 58 kmLincoln County 72 kmBear Lake County 75 kmMorgan County 75 kmWeber County 80 kmSummit County 86 kmFranklin County 87 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
-1.5 km below the surface
Felt
no reports yet
Nearest
Rich County, 15 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2943 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 41 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 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 41.6438, -111.0573. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rich County, UT 15 km (10 mi) E of here earthquakes near Rich County
Uinta County, WY 58 km (36 mi) NW of here earthquakes near Uinta County
Cache County, UT 58 km (36 mi) E of here earthquakes near Cache County
Lincoln County, WY 72 km (45 mi) SSW of here earthquakes near Lincoln County
Bear Lake County, ID 75 km (46 mi) SSE of here earthquakes near Bear Lake County
Morgan County, UT 75 km (47 mi) NE of here earthquakes near Morgan County

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

Aftershocks so far

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

  1. 0.8 9 km W of Garden, Utah
  2. 1.6 17 km E of North Logan, Utah
  3. 1.7 8 km SSW of Randolph, Utah
  4. 2.1 8 km SSW of Randolph, Utah
  5. 2.0 10 km W of Garden, Utah
  6. 2.9 17 km WSW of Garden, Utah
  7. 1.7 19 km NE of Bear River, Wyoming
  8. 2.8 10 km N of Bear River, Wyoming
  9. 1.7 28 km WSW of Bear River, Wyoming
  10. 2.0 7 km WNW of Woodruff, Utah
  11. 3.3 23 km SW of Woodruff, Utah
  12. 2.5 10 km WSW of Garden, Utah
  13. 2.3 14 km SW of Garden, Utah
  14. 2.3 17 km ENE of North Logan, Utah
  15. 2.1 1 km WSW of Diamondville, Wyoming

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.