QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

12 km SSW of Snowville, Utah

Yes. A magnitude 3.1 earthquake was recorded 12 km SSW of Snowville, Utah, at 2:58 pm MDT on 28 May 2026 (20:58 UTC), 3.4 km deep. 8 people have reported feeling it to USGS.

· 3.4 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Box Elder County 36 kmOneida County 42 kmCassia County 84 kmFranklin County 86 kmCache County 87 kmPower County 93 kmWeber County 100 kmBannock County 103 kmDavis County 103 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
Magnitude
M 3.1 (ml)
Depth
3.4 km below the surface
Felt
8 reports · strongest reported intensity II
Measured shaking
intensity III (ShakeMap)
Nearest
Box Elder County, 36 km SW
Nearest mapped fault
Hansel Valley fault, 8 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 93 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 42 km (26 mi) from the epicentre. 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.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× more

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 80 times the energy of this one.

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 · 23 km S of this epicentre
  2. 6.1 17 km NE of Snowville, Utah · 29 km NE of this epicentre
  3. 5.9 35 km SSW of Howell, Utah · 38 km SSE of this epicentre
  4. 5.6 Hansel Valley, Utah · 9 km SE of this epicentre
  5. 5.5 56 km SW of Howell, Utah · 44 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 41.8617, -112.7755. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Box Elder County, UT 36 km (22 mi) SW earthquakes near Box Elder County
Oneida County, ID 42 km (26 mi) NNE earthquakes near Oneida County
Cassia County, ID 84 km (52 mi) NW earthquakes near Cassia County
Franklin County, ID 86 km (53 mi) ENE earthquakes near Franklin County
Cache County, UT 87 km (54 mi) E earthquakes near Cache County
Power County, ID 93 km (58 mi) N earthquakes near Power County

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

Aftershocks so far

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

  1. 0.9 16 km SW of Thatcher, Utah
  2. 1.6 49 km SSW of Snowville, Utah
  3. 0.9 10 km SSW of Portage, Utah
  4. 1.2 3 km NNE of Thatcher, Utah
  5. 0.5 8 km E of Howell, Utah
  6. 0.1 13 km E of Snowville, Utah
  7. 0.7 10 km SE of Snowville, Utah
  8. 2.1 15 km WNW of Howell, Utah
  9. 2.0 12 km NNE of Howell, Utah
  10. 1.7 30 km SSW of Snowville, Utah
  11. 2.5 25 km NNW of Snowville, Utah
  12. 2.3 26 km NNW of Snowville, Utah
  13. 1.9 18 km SW of Howell, 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.