QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

Earthquake near Ogden, UT

USGS: 9 km ENE of Huntsville, Utah

61 km (38 mi) NNE of Salt Lake City, UT · 27 km (17 mi) ENE of Ogden, UT

9:06 pm MST, Dec 23, 2020 · · 13 km deep · released about 7.8 lb of TNT

Every earthquake near Ogden Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Weber County 18 kmMorgan County 22 kmCache County 51 kmRich County 52 kmDavis County 53 kmSalt Lake County 72 kmSummit County 74 kmUinta County 92 kmFranklin County 100 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
9:06 pm MST on 23 December 2020 ()
Where
27 km (17 mi) ENE of Ogden, UT · earthquakes near Ogden
Magnitude
M 1.6 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Weber County, 18 km W
Nearest mapped fault
Morgan fault, 15 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 2108 days ago

A magnitude 1.6 earthquake was recorded 27 km (17 mi) ENE of Ogden, UT, at 9:06 pm MST on 23 December 2020 (04:06 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, Uintah, Harrisville.

How big was it?

This earthquake released about 7.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 7.8 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 · 27 km NNE 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 41.2838, -111.6587. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Weber County, UT 18 km (11 mi) W earthquakes near Weber County
Morgan County, UT 22 km (14 mi) SSE earthquakes near Morgan County
Cache County, UT 51 km (31 mi) N earthquakes near Cache County
Rich County, UT 52 km (32 mi) NE earthquakes near Rich County
Davis County, UT 53 km (33 mi) WSW earthquakes near Davis County
Salt Lake County, UT 72 km (45 mi) SSW earthquakes near Salt Lake 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. 2.3 Utah
  2. 2.5 7 km SW of Corinne, Utah
  3. 1.8 7 km SW of Corinne, Utah
  4. 1.9 Utah
  5. 1.7 7 km SW of Corinne, Utah
  6. 1.6 13 km NE of Henefer, Utah
  7. 1.6 7 km SW of Corinne, Utah
  8. 2.7 Utah
  9. 1.9 5 km E of Huntsville, Utah
  10. 1.6 5 km E of Huntsville, Utah
  11. 2.1 14 km E of Providence, Utah
  12. 1.7 13 km SE of Avon, Utah
  13. 1.6 10 km SE of Avon, Utah
  14. 1.6 11 km ESE of North Logan, Utah
  15. 1.8 11 km E of Providence, 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.