QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

12 km SSW of Snowville, Utah

· 4.6 km deep · released about 41 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Box Elder County 37 kmOneida County 41 kmFranklin County 84 kmCache County 84 kmCassia County 86 kmPower County 93 kmWeber County 98 kmBannock County 102 kmDavis County 102 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 (md)
Depth
4.6 km below the surface
Felt
no reports yet
Nearest
Box Elder County, 37 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 174 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 41.8595, -112.7498. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Box Elder County, UT 37 km (23 mi) NE of here earthquakes near Box Elder County
Oneida County, ID 41 km (25 mi) SSW of here earthquakes near Oneida County
Franklin County, ID 84 km (52 mi) WSW of here earthquakes near Franklin County
Cache County, UT 84 km (52 mi) W of here earthquakes near Cache County
Cassia County, ID 86 km (54 mi) ESE of here earthquakes near Cassia County
Power County, ID 93 km (58 mi) S of here earthquakes near Power County

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

Aftershocks so far

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

  1. 2.1 15 km WNW of Howell, Utah
  2. 2.0 12 km NNE of Howell, Utah
  3. 1.7 30 km SSW of Snowville, Utah
  4. 2.5 25 km NNW of Snowville, Utah
  5. 2.3 26 km NNW of Snowville, Utah
  6. 1.9 18 km SW of Howell, Utah
  7. 3.1 12 km SSW of Snowville, Utah
  8. 1.9 11 km SSW of Snowville, Utah
  9. 1.9 11 km SSW of Snowville, Utah
  10. 1.9 8 km WSW of Thatcher, Utah
  11. 1.9 7 km W of Thatcher, Utah
  12. 1.8 7 km W of Thatcher, Utah
  13. 1.5 53 km SW of Howell, Utah
  14. 1.8 53 km SW of Howell, Utah
  15. 2.0 23 km NNW of Snowville, 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 4.4 on 2024-05-05 — it released about 2,600 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.