QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

Earthquake near Logan, UT

No earthquake was likely felt in Logan in the 24 hours to 4:35 pm MST (23:35 UTC). The last one was M 2.6, 16 km (10 mi) ESE, at 6:52 am MDT on 25 June 2026, estimated intensity II (weak) in town; 19 felt reports to USGS. Every earthquake near Logan

This page: a magnitude 2.1 earthquake was recorded 48 km (30 mi) west-northwest of Logan, UT, at 5:27 am MDT on 21 October 2022 (11:27 UTC), 6.9 km deep.

USGS: 12 km NNE of Howell, Utah

47 km (29 mi) WNW of Logan, UT · 130 km (81 mi) NNW of Salt Lake City, UT

5:27 am MDT, Oct 21, 2022 · · 6.9 km deep · released about 46 lb of TNT

10 km30 km60 km120 km N Oneida County 34 kmFranklin County 55 kmCache County 55 kmBox Elder County 65 kmWeber County 81 kmBannock County 89 kmBear Lake County 96 kmDavis County 97 kmPower County 97 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
5:27 am MDT on 21 October 2022 ()
Where
48 km (30 mi) west-northwest of Logan, UT · earthquakes near Logan
Magnitude
M 2.1 (ml)
Depth
6.9 km below the surface
Felt
no reports yet
Nearest
Oneida County, 34 km NNW
Nearest mapped fault
North Promontory 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 1482 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 16 km (10 mi) from the epicentre. In Logan, 48 km away, the estimate is intensity II (weak). 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: Garland, Tremonton, Elwood.

How big was it?

This earthquake released about 46 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 8 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.6 The 1934 Hansel Valley, Utah Earthquake · 44 km SW of this epicentre
  2. 6.1 17 km NE of Snowville, Utah · 23 km NW of this epicentre
  3. 5.9 35 km SSW of Howell, Utah · 48 km SSW of this epicentre
  4. 5.6 Hansel Valley, Utah · 29 km WSW of this epicentre
  5. 5.2 27 km SW of Thatcher, Utah · 45 km SSW 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 41.8965, -112.3712. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Oneida County, ID 34 km (21 mi) NNW earthquakes near Oneida County
Franklin County, ID 55 km (34 mi) NE earthquakes near Franklin County
Cache County, UT 55 km (34 mi) ESE earthquakes near Cache County
Box Elder County, UT 65 km (40 mi) WSW earthquakes near Box Elder County
Weber County, UT 81 km (50 mi) SSE earthquakes near Weber County
Bannock County, ID 89 km (56 mi) N earthquakes near Bannock County

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

Aftershocks so far

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

  1. 1.8 Utah
  2. 1.5 6 km SW of Corinne, Utah
  3. 2.0 Utah
  4. 2.5 7 km SW of Corinne, Utah
  5. 1.6 7 km SW of Corinne, Utah
  6. 1.9 7 km SW of Corinne, Utah
  7. 2.2 7 km SW of Corinne, Utah
  8. 1.6 11 km E of Snowville, Utah
  9. 1.9 8 km SW of Corinne, Utah
  10. 1.7 7 km SW of Corinne, Utah
  11. 3.2 7 km SW of Corinne, Utah
  12. 1.6 Utah
  13. 2.3 7 km SW of Corinne, Utah
  14. 2.1 8 km SW of Corinne, Utah
  15. 2.9 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.