QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

Earthquake near Evanston, WY

USGS: 19 km ENE of Echo, Utah

66 km (41 mi) ENE of Salt Lake City, UT

6:17 pm MDT, Jun 18, 2018 · · 23 km deep · released about 14 lb of TNT

Every earthquake near Evanston Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Morgan County 28 kmSummit County 32 kmWeber County 58 kmUinta County 62 kmRich County 62 kmSalt Lake County 73 kmDavis County 81 kmWasatch County 82 kmCache County 85 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
6:17 pm MDT on 18 June 2018 ()
Where
32 km (20 mi) SW of Evanston, WY · earthquakes near Evanston
Magnitude
M 1.8 (ml)
Depth
23 km below the surface
Felt
no reports yet
Nearest
Morgan County, 28 km W
Nearest mapped fault
Main Canyon fault, 24 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3027 days ago

A magnitude 1.8 earthquake was recorded 32 km (20 mi) SW of Evanston, WY, at 6:17 pm MDT on 18 June 2018 (00:17 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Coalville.

How big was it?

This earthquake released about 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 41.0678, -111.2425. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Morgan County, UT 28 km (18 mi) W earthquakes near Morgan County
Summit County, UT 32 km (20 mi) SE earthquakes near Summit County
Weber County, UT 58 km (36 mi) WNW earthquakes near Weber County
Uinta County, WY 62 km (39 mi) ENE earthquakes near Uinta County
Rich County, UT 62 km (39 mi) N earthquakes near Rich County
Salt Lake County, UT 73 km (45 mi) SW earthquakes near Salt Lake County

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

Aftershocks so far

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

  1. 1.7 8 km E of Enterprise, Utah
  2. 1.8 13 km NNW of Summit Park, Utah
  3. 1.8 4 km NNW of Henefer, Utah
  4. 1.7 0 km SSE of Silver Summit, Utah
  5. 2.2 4 km E of Huntsville, Utah
  6. 1.9 4 km E of Huntsville, Utah
  7. 1.5 3 km ENE of Huntsville, Utah
  8. 2.0 18 km WSW of Woodruff, Utah
  9. 2.4 19 km WSW of Woodruff, Utah
  10. 2.4 18 km WSW of Woodruff, Utah
  11. 2.2 11 km ENE of Wolf Creek, Utah
  12. 2.3 12 km ENE of Wolf Creek, Utah
  13. 2.9 8 km NE of Enterprise, Utah
  14. 1.6 9 km ENE of Huntsville, Utah
  15. 2.0 7 km ESE of Morgan, 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.