QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

5 km E of Heber City, Utah

· 11 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Wasatch County 24 kmUtah County 50 kmSalt Lake County 52 kmSummit County 52 kmMorgan County 69 kmDuchesne County 81 kmDavis County 94 kmWeber County 97 kmUinta County 110 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
11 km below the surface
Felt
no reports yet
Nearest
Wasatch County, 24 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 90 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 17 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 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× the energy of this one
  4. This earthquake M 1.8 about 17 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 40.4998, -111.3483. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Wasatch County, UT 24 km (15 mi) NW of here earthquakes near Wasatch County
Utah County, UT 50 km (31 mi) NNE of here earthquakes near Utah County
Salt Lake County, UT 52 km (32 mi) ESE of here earthquakes near Salt Lake County
Summit County, UT 52 km (33 mi) SW of here earthquakes near Summit County
Morgan County, UT 69 km (43 mi) SSE of here earthquakes near Morgan County
Duchesne County, UT 81 km (50 mi) WNW of here earthquakes near Duchesne County

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

Aftershocks so far

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

  1. 1.6 21 km W of Tabiona, Utah
  2. 1.6 8 km E of Independence, Utah
  3. 1.6 2 km ENE of Summit Park, Utah
  4. 1.6 19 km E of Independence, Utah
  5. 2.3 19 km E of Independence, Utah
  6. 2.4 19 km E of Independence, Utah
  7. 1.9 20 km E of Independence, 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.