QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near Logan, UT

No earthquake was likely felt in Logan in the 24 hours to 6:01 pm MST (01:01 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 1.7 earthquake was recorded 45 km (28 mi) west-southwest of Logan, UT, at 9:16 pm MDT on 14 March 2025 (03:16 UTC), 9.1 km deep.

USGS: 9 km SSW of Thatcher, Utah

45 km (28 mi) WSW of Logan, UT · 100 km (62 mi) NNW of Salt Lake City, UT

9:16 pm MDT, Mar 14, 2025 · · 9.1 km deep · released about 11 lb of TNT

Every earthquake near Logan Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cache County 52 kmWeber County 56 kmBox Elder County 59 kmOneida County 64 kmDavis County 66 kmFranklin County 76 kmMorgan County 88 kmRich County 93 kmSalt Lake County 112 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
9:16 pm MDT on 14 March 2025 ()
Where
45 km (28 mi) west-southwest of Logan, UT · earthquakes near Logan
Magnitude
M 1.7 (ml)
Depth
9.1 km below the surface
Felt
no reports yet
Nearest
Cache County, 52 km ENE
Nearest mapped fault
North Promontory 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 604 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 9 km (6 mi) from the epicentre. In Logan, 45 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: Tremonton, Elwood, Garland, Honeyville.

How big was it?

This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 970,000× the energy of this one
  3. Around the size people start to feel M 3.0 86× the energy of this one
  4. This earthquake M 1.7 about 11 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

The largest earthquake within 50 km since 2016 was M 4.4 on 2024-05-05 — about 9,800 times the energy of this one.

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 · 37 km W of this epicentre
  2. 5.9 35 km SSW of Howell, Utah · 29 km WSW of this epicentre
  3. 5.6 Hansel Valley, Utah · 35 km NW of this epicentre
  4. 5.2 27 km SW of Thatcher, Utah · 18 km SW of this epicentre
  5. 5.1 27 km SW of Thatcher, Utah · 18 km SW 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 41.6190, -112.3565. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Cache County, UT 52 km (33 mi) ENE earthquakes near Cache County
Weber County, UT 56 km (35 mi) SE earthquakes near Weber County
Box Elder County, UT 59 km (36 mi) W earthquakes near Box Elder County
Oneida County, ID 64 km (40 mi) NNW earthquakes near Oneida County
Davis County, UT 66 km (41 mi) SSE earthquakes near Davis County
Franklin County, ID 76 km (47 mi) NE earthquakes near Franklin County

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

Aftershocks so far

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

  1. 0.9 16 km SW of Thatcher, Utah
  2. 0.9 10 km SSW of Portage, Utah
  3. 1.2 3 km NNE of Thatcher, Utah
  4. 0.5 8 km E of Howell, Utah
  5. 0.1 13 km E of Snowville, Utah
  6. 0.7 10 km SE of Snowville, Utah
  7. 2.1 15 km WNW of Howell, Utah
  8. 2.0 12 km NNE of Howell, Utah
  9. 1.7 30 km SSW of Snowville, Utah
  10. 1.9 18 km SW of Howell, Utah
  11. 3.1 12 km SSW of Snowville, Utah
  12. 1.9 11 km SSW of Snowville, Utah
  13. 1.9 11 km SSW of Snowville, Utah
  14. 1.9 8 km WSW of Thatcher, Utah
  15. 1.9 7 km W of Thatcher, 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.