QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

Utah

· 5.0 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Iron County 69 kmPiute County 76 kmKane County 83 kmBeaver County 91 kmGarfield County 97 kmWashington County 98 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
5.0 km below the surface
Felt
no reports yet
Nearest
Iron County, 69 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1107 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 480 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 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 37.7435, -112.5517. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Iron County, UT 69 km (43 mi) ESE of here earthquakes near Iron County
Piute County, UT 76 km (47 mi) SSW of here earthquakes near Piute County
Kane County, UT 83 km (52 mi) NW of here earthquakes near Kane County
Beaver County, UT 91 km (57 mi) SE of here earthquakes near Beaver County
Garfield County, UT 97 km (60 mi) W of here earthquakes near Garfield County
Washington County, UT 98 km (61 mi) ENE of here earthquakes near Washington 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. 2.4 1 km S of Summit, Utah
  2. 2.0 1 km SSE of Summit, Utah
  3. 1.6 2 km SSW of Summit, Utah
  4. 1.8 1 km SSE of Summit, Utah
  5. 1.6 1 km SSE of Summit, Utah
  6. 2.4 1 km SSE of Summit, Utah
  7. 2.7 1 km WSW of Summit, Utah
  8. 2.3 4 km WNW of Panguitch, Utah
  9. 1.8 12 km ENE of Kanarraville, Utah
  10. 2.7 0 km N of Summit, Utah
  11. 1.8 2 km ENE of Summit, Utah
  12. 1.6 21 km S of Brian Head, Utah
  13. 1.8 2 km ENE of Summit, Utah
  14. 2.0 7 km WNW of Enoch, Utah
  15. 2.7 3 km NE of Summit, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2020-10-03 — it released about 270 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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