QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

14 km E of Fredonia, Arizona

· 19 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kane County 61 kmWashington County 105 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 2.9 (ml)
Depth
19 km below the surface
Felt
15 reports · strongest reported intensity IV
Nearest
Kane County, 61 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 605 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 15 people have reported feeling it to USGS.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 36.9460, -112.3687. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kane County, UT 61 km (38 mi) SW of here earthquakes near Kane County
Washington County, UT 105 km (65 mi) ESE of here earthquakes near Washington County
Garfield County, UT 128 km (79 mi) SW of here earthquakes near Garfield County
Iron County, UT 135 km (84 mi) SE of here earthquakes near Iron County

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

Aftershocks so far

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

  1. 1.6 7 km NE of Hildale, Utah
  2. 1.6 7 km NE of Hildale, Utah
  3. 1.6 7 km NE of Hildale, Utah
  4. 1.7 22 km SW of Big Water, Utah
  5. 1.8 18 km ESE of Fredonia, Arizona
  6. 1.5 7 km NE of Hildale, Utah
  7. 1.5 7 km NE of Hildale, Utah
  8. 1.5 10 km NE of Hildale, Utah
  9. 2.8 22 km SW of Big Water, Utah
  10. 2.3 10 km NE of Hildale, Utah
  11. 1.9 11 km NE of Hildale, Utah
  12. 1.6 11 km NE of Hildale, Utah
  13. 1.7 7 km SE of Fredonia, Arizona
  14. 1.6 5 km NE of Hildale, Utah
  15. 1.8 0 km N of Cane Beds, Arizona

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.