QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

19 km WSW of Smoot, Wyoming

· 5.0 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Bear Lake County 32 kmCaribou County 45 kmLincoln County 49 kmFranklin County 70 kmBannock County 93 kmRich County 101 kmSublette County 102 kmCache County 103 kmBonneville County 105 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 2.8 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Bear Lake County, 32 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2607 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 42.5311, -111.1152. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bear Lake County, ID 32 km (20 mi) NNE of here earthquakes near Bear Lake County
Caribou County, ID 45 km (28 mi) SE of here earthquakes near Caribou County
Lincoln County, WY 49 km (30 mi) NW of here earthquakes near Lincoln County
Franklin County, ID 70 km (44 mi) NE of here earthquakes near Franklin County
Bannock County, ID 93 km (58 mi) E of here earthquakes near Bannock County
Rich County, UT 101 km (63 mi) N of here earthquakes near Rich County

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

Aftershocks so far

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

  1. 2.4 21 km W of Fairview, Wyoming
  2. 2.4 18 km WSW of Fairview, Wyoming
  3. 1.9 18 km NE of Georgetown, Idaho
  4. 1.6 5 km WNW of Georgetown, Idaho
  5. 1.7 11 km E of Soda Springs, Idaho
  6. 1.9 10 km ENE of Soda Springs, Idaho
  7. 2.3 14 km NNW of Georgetown, Idaho
  8. 2.5 9 km W of Paris, Idaho
  9. 1.6 4 km SE of Bennington, Idaho
  10. 1.8 5 km ESE of Soda Springs, Idaho
  11. 1.6 20 km WSW of Smoot, Wyoming
  12. 2.0 20 km ENE of Soda Springs, Idaho
  13. 3.1 12 km NNW of Georgetown, Idaho
  14. 3.3 18 km ENE of Georgetown, Idaho
  15. 2.4 14 km E of Soda Springs, Idaho

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 5.3 on 2017-09-02 — it released about 5,600 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.