QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2ml

4 km NNE of Richfield, Utah

· 12 km deep · released about 1,700 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sevier County 23 kmPiute County 53 kmSanpete County 75 kmMillard County 94 kmWayne County 112 kmBeaver County 114 kmJuab County 118 kmEmery County 118 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 3.2 (ml)
Depth
12 km below the surface
Felt
167 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
Sevier County, 23 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 991 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 167 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 200,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 8,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,200× the energy of this one
  4. This earthquake M 3.2 about 1,700 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.8× 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 38.8137, -112.0640. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sevier County, UT 23 km (14 mi) WNW of here earthquakes near Sevier County
Piute County, UT 53 km (33 mi) N of here earthquakes near Piute County
Sanpete County, UT 75 km (47 mi) SW of here earthquakes near Sanpete County
Millard County, UT 94 km (58 mi) E of here earthquakes near Millard County
Wayne County, UT 112 km (69 mi) WNW of here earthquakes near Wayne County
Beaver County, UT 114 km (71 mi) ENE of here earthquakes near Beaver County

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

Aftershocks so far

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

  1. 1.9 30 km N of Fremont, Utah
  2. 1.8 12 km SW of Kanosh, Utah
  3. 1.8 16 km SW of Kanosh, Utah
  4. 1.5 7 km S of Joseph, Utah
  5. 1.7 14 km WSW of Kanosh, Utah
  6. 1.9 7 km SE of Holden, Utah
  7. 1.5 3 km NNE of Joseph, Utah
  8. 2.5 27 km W of Emery, Utah
  9. 1.8 24 km SSW of Kanosh, Utah
  10. 2.3 24 km SSW of Kanosh, Utah
  11. 1.9 5 km NE of Koosharem, Utah
  12. 1.6 10 km NNW of Aurora, Utah
  13. 1.9 11 km NW of Aurora, Utah
  14. 1.8 9 km SW of Kanosh, Utah
  15. 1.8 8 km SSE of Joseph, 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 4.0 on 2019-02-20 — it released about 20 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.