QuakeIndex

Earthquake · reviewed by a seismologist

M 3.9ml

4 km WNW of Independence, Utah

· 14 km deep · released about 12 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Wasatch County 12 kmUtah County 38 kmSalt Lake County 65 kmSummit County 68 kmDuchesne County 74 kmMorgan County 89 kmCarbon County 94 kmSanpete County 108 kmDavis County 110 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 3.9 (ml)
Depth
14 km below the surface
Felt
2650 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Wasatch County, 12 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 345 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2650 people have reported feeling it to USGS.

How big was it?

This earthquake released about 12 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.9 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 14,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 620× the energy of this one
  3. Magna, Utah 2020 M 5.7 440× the energy of this one
  4. This earthquake M 3.9 about 12 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 26× 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 40.3173, -111.3042. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Wasatch County, UT 12 km (8 mi) W of here earthquakes near Wasatch County
Utah County, UT 38 km (24 mi) NE of here earthquakes near Utah County
Salt Lake County, UT 65 km (41 mi) SE of here earthquakes near Salt Lake County
Summit County, UT 68 km (42 mi) SSW of here earthquakes near Summit County
Duchesne County, UT 74 km (46 mi) W of here earthquakes near Duchesne County
Morgan County, UT 89 km (55 mi) SSE of here earthquakes near Morgan County

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

Aftershocks so far

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

  1. 1.6 21 km W of Tabiona, Utah
  2. 1.6 8 km E of Independence, Utah
  3. 1.6 19 km E of Independence, Utah
  4. 2.3 19 km E of Independence, Utah
  5. 2.4 19 km E of Independence, Utah
  6. 1.9 20 km E of Independence, Utah
  7. 1.8 5 km E of Heber City, Utah
  8. 2.5 8 km SSE of Woodland Hills, Utah
  9. 1.9 26 km S of Independence, Utah
  10. 1.9 24 km SSE of Independence, Utah
  11. 2.4 24 km SSE of Independence, Utah
  12. 1.8 25 km SSE of Independence, Utah
  13. 2.2 25 km SSE of Independence, Utah
  14. 1.5 24 km SSE of Independence, Utah
  15. 2.0 25 km SSE of Independence, 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.