QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

13 km E of Huntsville, Utah

· 9.9 km deep · released about 1.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Morgan County 21 kmWeber County 23 kmRich County 49 kmCache County 52 kmDavis County 57 kmSummit County 70 kmSalt Lake County 73 kmUinta County 88 kmFranklin County 101 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 3.3 (md)
Depth
9.9 km below the surface
Felt
267 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Morgan County, 21 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 173 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 267 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,600× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× more

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 41.2773, -111.6063. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Morgan County, UT 21 km (13 mi) N of here earthquakes near Morgan County
Weber County, UT 23 km (14 mi) E of here earthquakes near Weber County
Rich County, UT 49 km (31 mi) SW of here earthquakes near Rich County
Cache County, UT 52 km (32 mi) SSE of here earthquakes near Cache County
Davis County, UT 57 km (35 mi) ENE of here earthquakes near Davis County
Summit County, UT 70 km (43 mi) NW of here earthquakes near Summit County

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

Aftershocks so far

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

  1. 1.7 8 km SSW of Randolph, Utah
  2. 2.1 8 km SSW of Randolph, Utah
  3. 1.9 14 km ENE of Huntsville, Utah
  4. 1.6 15 km E of Providence, Utah
  5. 1.6 13 km ESE of Millville, Utah
  6. 1.9 16 km E of Providence, Utah
  7. 2.0 12 km E of Millville, Utah
  8. 2.6 12 km E of Millville, Utah
  9. 1.5 9 km ENE of Avon, Utah
  10. 2.1 3 km WNW of Huntsville, Utah
  11. 1.5 10 km ENE of Mountain Green, Utah
  12. 1.6 18 km N of Henefer, Utah
  13. 1.7 2 km ESE of Echo, 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.