QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

7 km NNW of Robertson, Wyoming

· 8.8 km deep · released about 41 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Uinta County 10 kmSummit County 61 kmRich County 79 kmDaggett County 88 kmMorgan County 96 kmDuchesne County 107 kmLincoln County 111 kmWasatch County 118 kmWeber County 120 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
8.8 km below the surface
Felt
no reports yet
Nearest
Uinta County, 10 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 724 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 41.2488, -110.4452. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Uinta County, WY 10 km (6 mi) ESE of here earthquakes near Uinta County
Summit County, UT 61 km (38 mi) NE of here earthquakes near Summit County
Rich County, UT 79 km (49 mi) ESE of here earthquakes near Rich County
Daggett County, UT 88 km (55 mi) WNW of here earthquakes near Daggett County
Morgan County, UT 96 km (60 mi) E of here earthquakes near Morgan County
Duchesne County, UT 107 km (66 mi) N of here earthquakes near Duchesne County

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

Aftershocks so far

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

  1. 1.6 24 km SE of Evanston, Wyoming
  2. 2.4 11 km NE of Lyman, Wyoming
  3. 1.6 13 km SSW of Granger, Wyoming
  4. 1.8 20 km ESE of Evanston, Wyoming
  5. 1.6 14 km SSW of Granger, Wyoming
  6. 1.7 19 km NE of Bear River, Wyoming
  7. 1.9 22 km ESE of Evanston, Wyoming
  8. 2.2 20 km ESE of Evanston, Wyoming
  9. 2.0 20 km ESE of Evanston, Wyoming
  10. 1.6 27 km S of Evanston, 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.