QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

4 km WNW of Silver Summit, Utah

· 13 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salt Lake County 34 kmMorgan County 38 kmSummit County 50 kmWasatch County 56 kmDavis County 64 kmWeber County 64 kmUtah County 71 kmRich County 101 kmUinta County 102 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 1.7 (ml)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Salt Lake County, 34 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 342 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 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 92× the energy of this one
  4. This earthquake M 1.7 about 10 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 40.7507, -111.5403. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Salt Lake County, UT 34 km (21 mi) ENE of here earthquakes near Salt Lake County
Morgan County, UT 38 km (24 mi) S of here earthquakes near Morgan County
Summit County, UT 50 km (31 mi) WSW of here earthquakes near Summit County
Wasatch County, UT 56 km (35 mi) NW of here earthquakes near Wasatch County
Davis County, UT 64 km (40 mi) ESE of here earthquakes near Davis County
Weber County, UT 64 km (40 mi) SSE of here earthquakes near Weber County

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

Aftershocks so far

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

  1. 2.0 6 km WNW of Lehi, Utah
  2. 1.6 2 km ENE of Summit Park, Utah
  3. 1.8 5 km E of Heber City, Utah
  4. 2.2 5 km ENE of Magna, Utah
  5. 2.1 5 km NW of Summit Park, Utah
  6. 1.5 10 km ENE of Mountain Green, Utah
  7. 1.7 5 km NE of Magna, Utah
  8. 1.7 5 km ENE of Magna, Utah
  9. 1.9 6 km WNW of Lehi, Utah
  10. 2.2 5 km WNW of Lehi, Utah
  11. 1.6 18 km N of Henefer, Utah
  12. 2.0 4 km NNW of West Valley City, Utah
  13. 1.7 2 km ESE of Echo, Utah
  14. 3.5 4 km NNW of West Valley City, Utah
  15. 1.7 6 km WNW of Lehi, 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 5.7 on 2020-03-18 — it released about 1,000,000 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.