QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Earthquake near North Logan, UT

No earthquake was likely felt in North Logan in the 24 hours to 11:01 pm MST (06:01 UTC). The last one was M 2.6, 16 km (10 mi) SE, at 6:52 am MDT on 25 June 2026, estimated intensity II (weak) in town; 19 felt reports to USGS. Every earthquake near North Logan

This page: a magnitude 1.5 earthquake was recorded 14 km (9 mi) east-southeast of North Logan, UT, at 6:16 pm MDT on 18 July 2023 (00:16 UTC), 13 km deep.

USGS: 14 km ESE of North Logan, Utah

16 km (10 mi) E of Logan, UT · 108 km (67 mi) NNE of Salt Lake City, UT

6:16 pm MDT, Jul 18, 2023 · · 13 km deep · released about 5.6 lb of TNT

Every earthquake near North Logan Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cache County 8 kmRich County 36 kmFranklin County 52 kmWeber County 54 kmBear Lake County 68 kmMorgan County 70 kmOneida County 88 kmDavis County 89 kmLincoln County 98 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
6:16 pm MDT on 18 July 2023 ()
Where
14 km (9 mi) east-southeast of North Logan, UT · earthquakes near North Logan
Magnitude
M 1.5 (ml)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Cache County, 8 km W
Nearest mapped fault
East Cache fault, 12 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 1198 days ago

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

At this magnitude and depth it was probably too small to be felt, even directly above it. In North Logan, 14 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: Providence, River Heights, Millville, Logan, Nibley, Hyde Park.

How big was it?

This earthquake released about 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 4 earthquakes of M5 or more within 50 km:

  1. 5.8 8 km W of Garden City, Utah · 27 km NNE of this epicentre
  2. 5.5 26 km E of Avon, Utah · 28 km SSE of this epicentre
  3. 5.2 16 km ENE of North Logan, Utah · 10 km NNE of this epicentre
  4. 5.0 2 km S of Richmond, Utah · 24 km NW 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 41.7227, -111.6483. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Cache County, UT 8 km (5 mi) W earthquakes near Cache County
Rich County, UT 36 km (22 mi) ESE earthquakes near Rich County
Franklin County, ID 52 km (32 mi) NNW earthquakes near Franklin County
Weber County, UT 54 km (33 mi) SSW earthquakes near Weber County
Bear Lake County, ID 68 km (42 mi) NNE earthquakes near Bear Lake County
Morgan County, UT 70 km (44 mi) S earthquakes near Morgan County

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

Aftershocks so far

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

  1. 2.3 17 km ENE of Hyde Park, Utah
  2. 3.3 13 km E of Huntsville, Utah
  3. 1.5 8 km E of Avon, Utah
  4. 1.7 11 km NE of Franklin, Idaho
  5. 1.9 7 km NE of Huntsville, Utah
  6. 1.5 7 km NE of Huntsville, Utah
  7. 1.7 8 km NW of Garden City, Utah
  8. 1.8 8 km NW of Garden City, Utah
  9. 1.7 8 km NW of Garden City, Utah
  10. 2.3 12 km SW of Saint Charles, Idaho
  11. 1.5 17 km W of Bloomington, Idaho
  12. 1.7 9 km ENE of Avon, Utah
  13. 2.0 8 km ENE of Paradise, Utah
  14. 1.8 12 km ENE of Wolf Creek, Utah
  15. 2.9 6 km E of Avon, 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.