QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

22 km SW of Big Water, Utah

· 27 km deep · released about 530 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kane County 35 kmGarfield County 103 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 2.8 (ml)
Depth
27 km below the surface
Felt
no reports yet
Nearest
Kane County, 35 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 173 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 530 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 29,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 20,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.8× the energy of this one
  4. This earthquake M 2.8 about 530 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 36.9630, -111.8710. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kane County, UT 35 km (22 mi) S of here earthquakes near Kane County
Garfield County, UT 103 km (64 mi) SSW of here earthquakes near Garfield County

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

Aftershocks so far

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

  1. 1.8 35 km WSW of Big Water, Utah
  2. 1.9 27 km NNW of Bitter Springs, Arizona
  3. 1.7 22 km SW of Big Water, Utah
  4. 1.8 18 km ESE of Fredonia, 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.