QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

9 km NW of Richfield, Utah

· 7.6 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sevier County 32 kmPiute County 54 kmSanpete County 79 kmMillard County 85 kmBeaver County 107 kmJuab County 113 kmWayne County 120 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 1.5 (ml)
Depth
7.6 km below the surface
Felt
no reports yet
Nearest
Sevier County, 32 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 794 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 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 38.8252, -112.1647. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sevier County, UT 32 km (20 mi) WNW of here earthquakes near Sevier County
Piute County, UT 54 km (34 mi) N of here earthquakes near Piute County
Sanpete County, UT 79 km (49 mi) SW of here earthquakes near Sanpete County
Millard County, UT 85 km (53 mi) E of here earthquakes near Millard County
Beaver County, UT 107 km (66 mi) ENE of here earthquakes near Beaver County
Juab County, UT 113 km (70 mi) SSE of here earthquakes near Juab County

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

Aftershocks so far

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

  1. 1.8 9 km SSW of Kanosh, Utah
  2. 1.5 8 km SSW of Kanosh, Utah
  3. 2.2 9 km SSW of Kanosh, Utah
  4. 2.4 9 km SSW of Kanosh, Utah
  5. 1.7 11 km SSW of Kanosh, Utah
  6. 1.9 8 km SSW of Kanosh, Utah
  7. 1.8 11 km SSW of Kanosh, Utah
  8. 1.6 9 km SSW of Kanosh, Utah
  9. 1.9 9 km SSW of Kanosh, Utah
  10. 1.6 9 km SSW of Kanosh, Utah
  11. 1.8 10 km SSW of Kanosh, Utah
  12. 1.9 11 km SSW of Kanosh, Utah
  13. 1.7 9 km SSW of Kanosh, Utah
  14. 2.2 9 km SSW of Kanosh, Utah
  15. 2.6 9 km SSW of Kanosh, 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 6,200 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.