QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

Earthquake near Ogden, UT

No earthquake was likely felt in Ogden in the 24 hours to 2:46 pm MST (21:46 UTC). The last one was M 3.5, 56 km (35 mi) S, at 6:32 pm MST on 13 February 2026, estimated intensity II (weak) in town; 4,122 felt reports to USGS. Every earthquake near Ogden

This page: a magnitude 1.9 earthquake was recorded 49 km (30 mi) northwest of Ogden, UT, at 1:57 pm MDT on 30 September 2020 (19:57 UTC), 6.9 km deep.

USGS: 19 km SSW of Thatcher, Utah

93 km (58 mi) NNW of Salt Lake City, UT · 49 km (30 mi) NW of Ogden, UT

1:57 pm MDT, Sep 30, 2020 · · 6.9 km deep · released about 19 lb of TNT

Every earthquake near Ogden Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Weber County 52 kmBox Elder County 57 kmDavis County 58 kmCache County 58 kmOneida County 73 kmMorgan County 84 kmFranklin County 85 kmRich County 96 kmSalt Lake County 104 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
1:57 pm MDT on 30 September 2020 ()
Where
49 km (30 mi) northwest of Ogden, UT · earthquakes near Ogden
Magnitude
M 1.9 (ml)
Depth
6.9 km below the surface
Felt
no reports yet
Nearest
Weber County, 52 km SE
Nearest mapped fault
Great Salt Lake fault, 22 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 2228 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 12 km (7 mi) from the epicentre. In Ogden, 49 km away, the estimate is intensity I (not felt). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Earthquakes near other towns within 30 km: Elwood, Tremonton, Honeyville, Garland.

How big was it?

This earthquake released about 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 · 36 km WNW of this epicentre
  2. 5.9 35 km SSW of Howell, Utah · 24 km W of this epicentre
  3. 5.6 Hansel Valley, Utah · 39 km NW of this epicentre
  4. 5.2 27 km SW of Thatcher, Utah · 10 km WSW of this epicentre
  5. 5.1 27 km SW of Thatcher, Utah · 10 km WSW 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 41.5353, -112.3892. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Weber County, UT 52 km (32 mi) SE earthquakes near Weber County
Box Elder County, UT 57 km (35 mi) W earthquakes near Box Elder County
Davis County, UT 58 km (36 mi) SSE earthquakes near Davis County
Cache County, UT 58 km (36 mi) ENE earthquakes near Cache County
Oneida County, ID 73 km (45 mi) N earthquakes near Oneida County
Morgan County, UT 84 km (52 mi) SE earthquakes near Morgan County

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

Aftershocks so far

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

  1. 1.7 24 km SSW of Snowville, Utah
  2. 2.0 19 km S of Snowville, Utah
  3. 1.6 12 km NNE of Howell, Utah
  4. 1.5 6 km SW of Corinne, Utah
  5. 2.4 6 km SW of Corinne, Utah
  6. 2.0 17 km WSW of Howell, Utah
  7. 2.2 8 km SSW of Portage, Utah
  8. 2.3 34 km WSW of Howell, Utah
  9. 1.8 20 km WSW of Corinne, Utah
  10. 1.7 5 km E of Howell, Utah
  11. 1.5 5 km E of Howell, Utah
  12. 2.4 5 km E of Howell, Utah
  13. 1.7 17 km W of Portage, Utah
  14. 2.3 18 km W of Portage, Utah
  15. 1.5 5 km SSE of Snowville, 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.