QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

12 km E of Brian Head, Utah

· 4.8 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Iron County 58 kmWashington County 84 kmPiute County 88 kmBeaver County 88 kmKane County 91 kmGarfield County 111 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 2.1 (ml)
Depth
4.8 km below the surface
Felt
no reports yet
Nearest
Iron County, 58 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2092 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 40 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
  3. Around the size people start to feel M 3.0 24× the energy of this one
  4. This earthquake M 2.1 about 40 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 37.6913, -112.7045. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Iron County, UT 58 km (36 mi) ESE of here earthquakes near Iron County
Washington County, UT 84 km (52 mi) NE of here earthquakes near Washington County
Piute County, UT 88 km (54 mi) SW of here earthquakes near Piute County
Beaver County, UT 88 km (54 mi) SSE of here earthquakes near Beaver County
Kane County, UT 91 km (57 mi) WNW of here earthquakes near Kane County
Garfield County, UT 111 km (69 mi) W of here earthquakes near Garfield County

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

Aftershocks so far

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

  1. 2.3 21 km ESE of Kanarraville, Utah
  2. 3.1 20 km ESE of Kanarraville, Utah
  3. 2.1 21 km ESE of Kanarraville, Utah
  4. 1.6 9 km WNW of Panguitch, Utah
  5. 1.5 12 km S of Cedar City, Utah
  6. 2.0 9 km WNW of Panguitch, Utah
  7. 2.8 9 km WNW of Panguitch, Utah
  8. 2.0 10 km WNW of Panguitch, Utah
  9. 1.9 13 km ENE of Alton, Utah
  10. 1.7 18 km NW of Panguitch, Utah
  11. 1.5 10 km NNW of Enoch, Utah
  12. 2.5 10 km WNW of Panguitch, Utah
  13. 2.8 21 km N of Panguitch, Utah
  14. 1.7 13 km SSE of Kanarraville, Utah
  15. 1.6 10 km N 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

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