QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

13 km S of Brian Head, Utah

· 15 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Iron County 54 kmWashington County 65 kmBeaver County 94 kmKane County 98 kmPiute County 106 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
15 km below the surface
Felt
no reports yet
Nearest
Iron County, 54 km NW
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.

How big was it?

This earthquake released about 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 37.5708, -112.8598. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Iron County, UT 54 km (34 mi) SE of here earthquakes near Iron County
Washington County, UT 65 km (41 mi) ENE of here earthquakes near Washington County
Beaver County, UT 94 km (58 mi) SSE of here earthquakes near Beaver County
Kane County, UT 98 km (61 mi) WNW of here earthquakes near Kane County
Piute County, UT 106 km (66 mi) SW of here earthquakes near Piute County

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

Aftershocks so far

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

  1. 2.6 12 km SSE of Kanarraville, Utah
  2. 2.0 13 km SSE of Kanarraville, Utah
  3. 1.9 13 km SSE of Kanarraville, Utah
  4. 1.5 13 km SSE of Kanarraville, Utah
  5. 1.6 13 km SSE of Kanarraville, Utah
  6. 1.7 16 km NW of Parowan, Utah
  7. 1.7 9 km E of Springdale, Utah
  8. 1.6 5 km WSW of Panguitch, Utah
  9. 1.9 9 km E of Springdale, Utah
  10. 1.7 9 km E of Springdale, Utah
  11. 1.7 19 km E of Brian Head, Utah
  12. 1.8 Utah
  13. 1.9 3 km ENE of Enoch, Utah
  14. 1.7 18 km WSW of Panguitch, Utah
  15. 2.8 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.