QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

Earthquake near Logan, UT

No earthquake was likely felt in Logan in the 24 hours to 11:27 am MST (18:27 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 3.0 earthquake was recorded 47 km (29 mi) west-northwest of Logan, UT, at 9:29 pm MST on 6 December 2016 (04:29 UTC), 5.9 km deep. 7 people have reported feeling it to USGS.

USGS: 10 km WSW of Portage, Utah

46 km (29 mi) WNW of Logan, UT · 132 km (82 mi) NNW of Salt Lake City, UT

9:29 pm MST, Dec 6, 2016 · · 5.9 km deep · released about 920 lb of TNT

Every earthquake near Logan Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Oneida County 32 kmFranklin County 51 kmCache County 54 kmBox Elder County 68 kmWeber County 83 kmBannock County 86 kmBear Lake County 93 kmPower County 95 kmRich 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
9:29 pm MST on 6 December 2016 ()
Where
47 km (29 mi) west-northwest of Logan, UT · earthquakes near Logan
Magnitude
M 3.0 (ml)
Depth
5.9 km below the surface
Felt
7 reports · strongest reported intensity IV
Measured shaking
intensity II (ShakeMap)
Nearest
Oneida County, 32 km NNW
Nearest mapped fault
Wasatch fault, 14 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 3307 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 36 km (22 mi) from the epicentre. In Logan, 47 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.

Likely felt in: Tremonton 28 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 920 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 370,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 12,000× the energy of this one
  4. This earthquake M 3.0 about 920 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 7 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.6 The 1934 Hansel Valley, Utah Earthquake · 48 km SW of this epicentre
  2. 6.1 17 km NE of Snowville, Utah · 23 km NW of this epicentre
  3. 5.6 Hansel Valley, Utah · 33 km WSW of this epicentre
  4. 5.2 27 km SW of Thatcher, Utah · 49 km SSW of this epicentre
  5. 5.1 27 km SW of Thatcher, Utah · 49 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 41.9248, -112.3445. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Oneida County, ID 32 km (20 mi) NNW earthquakes near Oneida County
Franklin County, ID 51 km (32 mi) ENE earthquakes near Franklin County
Cache County, UT 54 km (34 mi) ESE earthquakes near Cache County
Box Elder County, UT 68 km (42 mi) WSW earthquakes near Box Elder County
Weber County, UT 83 km (51 mi) SSE earthquakes near Weber County
Bannock County, ID 86 km (53 mi) N earthquakes near Bannock County

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

Aftershocks so far

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

  1. 2.5 6 km WSW of Corinne, Utah
  2. 2.2 5 km ENE of Howell, Utah
  3. 2.5 20 km WSW of Corinne, Utah
  4. 1.7 4 km ENE of Howell, Utah
  5. 1.6 4 km NE of Howell, Utah
  6. 1.9 17 km W of Corinne, Utah
  7. 1.5 5 km ENE of Howell, Utah
  8. 1.9 5 km NE of Howell, Utah
  9. 3.9 5 km ENE of Howell, Utah
  10. 1.8 10 km W of Snowville, Utah
  11. 2.2 10 km WNW of Howell, Utah
  12. 1.7 11 km S of Snowville, Utah
  13. 1.7 8 km W of Plymouth, Utah
  14. 2.6 9 km NE of Howell, Utah
  15. 2.0 10 km WSW of Portage, 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.