QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

5 km NNW of Richfield, Utah

· 8.6 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sevier County 27 kmPiute County 53 kmSanpete County 77 kmMillard County 90 kmBeaver County 111 kmWayne County 115 kmJuab County 116 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 1.9 (ml)
Depth
8.6 km below the surface
Felt
1 report · strongest reported intensity IV
Nearest
Sevier County, 27 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 983 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 420,000× the energy of this one
  3. Around the size people start to feel M 3.0 38× the energy of this one
  4. This earthquake M 1.9 about 25 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 38.8145, -112.1053. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sevier County, UT 27 km (16 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 77 km (48 mi) SW of here earthquakes near Sanpete County
Millard County, UT 90 km (56 mi) E of here earthquakes near Millard County
Beaver County, UT 111 km (69 mi) ENE of here earthquakes near Beaver County
Wayne County, UT 115 km (71 mi) WNW of here earthquakes near Wayne County

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

Aftershocks so far

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

  1. 1.8 12 km SW of Kanosh, Utah
  2. 1.8 16 km SW of Kanosh, Utah
  3. 1.5 7 km S of Joseph, Utah
  4. 1.7 14 km WSW of Kanosh, Utah
  5. 1.9 7 km SE of Holden, Utah
  6. 1.5 3 km NNE of Joseph, Utah
  7. 2.5 27 km W of Emery, Utah
  8. 1.8 24 km SSW of Kanosh, Utah
  9. 2.3 24 km SSW of Kanosh, Utah
  10. 1.9 5 km NE of Koosharem, Utah
  11. 1.6 10 km NNW of Aurora, Utah
  12. 1.9 11 km NW of Aurora, Utah
  13. 1.6 22 km SW of Kanosh, 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 1,400 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.