QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Earthquake near Ogden, UT

USGS: 20 km WSW of Corinne, Utah

84 km (52 mi) NNW of Salt Lake City, UT · 40 km (25 mi) NW of Ogden, UT

7:43 pm MST, Feb 20, 2020 · · 0.4 km deep · released about 7.1 lb of TNT

Every earthquake near Ogden Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Weber County 44 kmDavis County 49 kmCache County 57 kmBox Elder County 63 kmMorgan County 75 kmOneida County 81 kmFranklin County 89 kmRich County 92 kmSalt Lake County 95 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
7:43 pm MST on 20 February 2020 ()
Where
40 km (25 mi) NW of Ogden, UT · earthquakes near Ogden
Magnitude
M 1.6 (ml)
Depth
0.4 km below the surface
Felt
no reports yet
Nearest
Weber County, 44 km ESE
Nearest mapped fault
Great Salt Lake fault, 21 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 2415 days ago

A magnitude 1.6 earthquake was recorded 40 km (25 mi) NW of Ogden, UT, at 7:43 pm MST on 20 February 2020 (02:43 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Perry, Willard, Brigham City, South Willard, Plain City, Honeyville.

How big was it?

This earthquake released about 7.1 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 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.1 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 6 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.6 The 1934 Hansel Valley, Utah Earthquake · 44 km WNW of this epicentre
  2. 5.9 35 km SSW of Howell, Utah · 30 km WNW of this epicentre
  3. 5.6 Hansel Valley, Utah · 48 km NW of this epicentre
  4. 5.2 27 km SW of Thatcher, Utah · 15 km WNW of this epicentre
  5. 5.1 27 km SW of Thatcher, Utah · 15 km WNW 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 41.4663, -112.3305. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Weber County, UT 44 km (27 mi) ESE earthquakes near Weber County
Davis County, UT 49 km (30 mi) SSE earthquakes near Davis County
Cache County, UT 57 km (35 mi) ENE earthquakes near Cache County
Box Elder County, UT 63 km (39 mi) WNW earthquakes near Box Elder County
Morgan County, UT 75 km (47 mi) ESE earthquakes near Morgan County
Oneida County, ID 81 km (51 mi) N earthquakes near Oneida County

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

Aftershocks so far

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

  1. 1.6 2 km WNW of West Point, Utah
  2. 2.0 17 km S of Snowville, Utah
  3. 2.3 5 km SSW of Thatcher, Utah
  4. 2.2 5 km SSW of Thatcher, Utah
  5. 2.1 5 km SSW of Thatcher, Utah
  6. 1.5 4 km SSW of Thatcher, Utah
  7. 2.6 5 km SSW of Thatcher, Utah
  8. 2.4 42 km SW of Howell, Utah
  9. 2.3 41 km WSW of Howell, Utah
  10. 1.8 45 km SW of Howell, Utah
  11. 1.8 47 km SW of Howell, Utah
  12. 3.5 47 km SW of Howell, Utah
  13. 2.2 6 km SSW of Thatcher, Utah
  14. 1.5 12 km NW of Plain City, Utah
  15. 1.6 5 km ENE of Howell, 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.