QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

8 km N of Richfield, Utah

· 12 km deep · released about 160 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sevier County 26 kmPiute County 57 kmSanpete County 73 kmMillard County 92 kmJuab County 114 kmBeaver County 114 kmWayne County 115 kmEmery County 119 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 2.5 (ml)
Depth
12 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Sevier County, 26 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1857 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 160 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 92,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 65,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.8× the energy of this one
  4. This earthquake M 2.5 about 160 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 38.8497, -112.0830. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sevier County, UT 26 km (16 mi) WNW of here earthquakes near Sevier County
Piute County, UT 57 km (36 mi) N of here earthquakes near Piute County
Sanpete County, UT 73 km (45 mi) SW of here earthquakes near Sanpete County
Millard County, UT 92 km (57 mi) E of here earthquakes near Millard County
Juab County, UT 114 km (71 mi) SSE of here earthquakes near Juab 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

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

  1. 2.4 3 km NNW of Joseph, Utah
  2. 1.5 24 km SSW of Kanosh, Utah
  3. 1.5 6 km S of Joseph, Utah
  4. 3.4 4 km S of Joseph, Utah
  5. 1.6 7 km SSE of Joseph, Utah
  6. 2.2 4 km S of Joseph, Utah
  7. 1.9 5 km S of Joseph, Utah
  8. 1.9 5 km S of Joseph, Utah
  9. 2.7 4 km S of Joseph, Utah
  10. 1.9 7 km S of Joseph, Utah
  11. 2.0 8 km S of Joseph, Utah
  12. 1.5 8 km S of Joseph, Utah
  13. 2.2 7 km S of Joseph, Utah
  14. 1.7 10 km SSW of Joseph, Utah
  15. 1.5 9 km N of Marysvale, 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 210 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.