QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near Ogden, UT

USGS: 3 km WSW of Huntsville, Utah

13 km (8 mi) ENE of Ogden, UT · 54 km (33 mi) N of Salt Lake City, UT

4:14 am MDT, Jul 7, 2018 · · 7.3 km deep · released about 9.6 lb of TNT

Every earthquake near Ogden Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Weber County 6 kmMorgan County 27 kmDavis County 40 kmCache County 54 kmRich County 63 kmSalt Lake County 66 kmSummit County 82 kmFranklin County 102 kmUinta County 105 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
4:14 am MDT on 7 July 2018 ()
Where
14 km (9 mi) ENE of Ogden, UT · earthquakes near Ogden
Magnitude
M 1.7 (ml)
Depth
7.3 km below the surface
Felt
no reports yet
Nearest
Weber County, 6 km WNW
Nearest mapped fault
Wasatch fault, 10 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 3007 days ago

A magnitude 1.7 earthquake was recorded 14 km (9 mi) ENE of Ogden, UT, at 4:14 am MDT on 7 July 2018 (10:14 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Wolf Creek, Liberty, Mountain Green, North Ogden, South Ogden, Harrisville.

How big was it?

This earthquake released about 9.6 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 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 99× the energy of this one
  4. This earthquake M 1.7 about 9.6 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 lists one earthquake of M5 or more within 50 km:

  1. 5.5 26 km E of Avon, Utah · 38 km NE of this epicentre

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 41.2520, -111.8132. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Weber County, UT 6 km (4 mi) WNW earthquakes near Weber County
Morgan County, UT 27 km (17 mi) SE earthquakes near Morgan County
Davis County, UT 40 km (25 mi) SW earthquakes near Davis County
Cache County, UT 54 km (33 mi) N earthquakes near Cache County
Rich County, UT 63 km (39 mi) NE earthquakes near Rich County
Salt Lake County, UT 66 km (41 mi) S earthquakes near Salt Lake County

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

Aftershocks so far

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

  1. 1.6 9 km ENE of Huntsville, Utah
  2. 1.6 8 km E of Avon, Utah
  3. 1.6 20 km WSW of Corinne, Utah
  4. 2.0 7 km ESE of Morgan, Utah
  5. 1.5 13 km ESE of Millville, Utah
  6. 1.5 20 km WSW of Corinne, Utah
  7. 1.6 20 km WSW of Corinne, Utah
  8. 2.6 20 km WSW of Corinne, Utah
  9. 1.6 19 km WSW of Corinne, Utah
  10. 1.6 9 km S of Avon, Utah
  11. 2.3 0 km NE of Echo, Utah
  12. 1.9 0 km NNE of Echo, Utah
  13. 2.1 0 km NE of Echo, Utah
  14. 2.3 6 km W of North Salt Lake, Utah
  15. 2.3 6 km W of North Salt Lake, 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.