QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

1 km SSE of Summit, Utah

· 0.9 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Iron County 36 kmBeaver County 69 kmWashington County 76 kmPiute County 93 kmKane County 114 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 (ml)
Depth
0.9 km below the surface
Felt
no reports yet
Nearest
Iron County, 36 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 846 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 37.7878, -112.9310. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Iron County, UT 36 km (22 mi) ESE of here earthquakes near Iron County
Beaver County, UT 69 km (43 mi) SSE of here earthquakes near Beaver County
Washington County, UT 76 km (47 mi) NE of here earthquakes near Washington County
Piute County, UT 93 km (58 mi) SW of here earthquakes near Piute County
Kane County, UT 114 km (71 mi) WNW of here earthquakes near Kane County
Sevier County, UT 145 km (90 mi) SW of here earthquakes near Sevier County

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

Aftershocks so far

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

  1. 1.9 17 km WNW of Cedar City, Utah
  2. 2.3 16 km NW of Cedar City, Utah
  3. 1.7 17 km WNW of Alton, Utah
  4. 1.8 6 km E of New Harmony, Utah
  5. 1.8 24 km S of Brian Head, Utah
  6. 1.6 24 km S of Brian Head, Utah
  7. 4.5 24 km S of Brian Head, Utah
  8. 1.7 27 km NE of Newcastle, Utah
  9. 2.0 12 km WNW of Cedar City, Utah
  10. 1.5 8 km NNW of Enoch, Utah
  11. 1.6 12 km NW of Summit, Utah
  12. 1.9 9 km NNW of Enoch, Utah
  13. 1.9 9 km NW of Enoch, Utah
  14. 1.9 9 km NW of Enoch, Utah
  15. 2.3 9 km NW of Enoch, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.