QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

5 km WNW of Sigurd, Utah

· 13 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sevier County 22 kmPiute County 59 kmSanpete County 69 kmMillard County 96 kmWayne County 112 kmEmery County 114 kmJuab County 116 kmBeaver 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 1.8 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Sevier County, 22 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2512 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 38.8593, -112.0252. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sevier County, UT 22 km (14 mi) NW of here earthquakes near Sevier County
Piute County, UT 59 km (37 mi) N of here earthquakes near Piute County
Sanpete County, UT 69 km (43 mi) SW of here earthquakes near Sanpete County
Millard County, UT 96 km (60 mi) E of here earthquakes near Millard County
Wayne County, UT 112 km (70 mi) NW of here earthquakes near Wayne County
Emery County, UT 114 km (71 mi) W of here earthquakes near Emery County

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

Aftershocks so far

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

  1. 2.4 16 km NNE of Koosharem, Utah
  2. 1.5 9 km SE of Scipio, Utah
  3. 1.6 7 km N of Marysvale, Utah
  4. 1.8 5 km NW of Central Valley, Utah
  5. 1.5 25 km ESE of Salina, Utah
  6. 1.7 5 km SSE of Sterling, Utah
  7. 1.9 20 km SE of Mayfield, Utah
  8. 2.7 8 km SSE of Joseph, Utah
  9. 2.8 4 km SSE of Joseph, Utah
  10. 1.6 10 km ESE of Glenwood, Utah
  11. 1.7 28 km N of Fremont, Utah
  12. 2.8 4 km NW of Aurora, Utah
  13. 2.5 8 km N of Richfield, Utah
  14. 1.6 2 km SW of Elsinore, Utah
  15. 1.7 18 km E of Holden, 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 2,100 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.