QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6ml

Earthquake near Richfield, UT

No earthquake was likely felt in Richfield in the 24 hours to 2:39 am MST (09:39 UTC). The last one was M 3.2, 34 km (21 mi) W, at 8:35 am MDT on 22 April 2026, estimated intensity II (weak) in town; 6 felt reports to USGS. Every earthquake near Richfield

This page: a magnitude 3.6 earthquake was recorded 34 km (21 mi) west of Richfield, UT, at 8:43 am MDT on 19 April 2026 (14:43 UTC), 4.1 km deep. 31 people have reported feeling it to USGS.

USGS: 8 km SSW of Kanosh, Utah

8:43 am MDT, Apr 19, 2026 · · 4.1 km deep · released about 4.2 tons of TNT

Every earthquake near Richfield Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Piute County 52 kmSevier County 57 kmMillard County 63 kmBeaver County 79 kmSanpete County 105 kmJuab County 114 kmIron County 117 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
8:43 am MDT on 19 April 2026 ()
Where
34 km (21 mi) west of Richfield, UT · earthquakes near Richfield
Magnitude
M 3.6 (ml)
Depth
4.1 km below the surface
Felt
31 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Piute County, 52 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 132 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 71 km (44 mi) from the epicentre. In Richfield, 34 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: Fillmore 30 km, intensity III · Monroe 32 km, intensity II · Richfield 34 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 4.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 40,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,300× the energy of this one
  4. This earthquake M 3.6 about 4.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 8.8× 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 4.1 on 2019-04-14 — about 4.4 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 6.6 Near Marysvale, Utah · 26 km SSE of this epicentre
  2. 5.2 0 km SSW of Central Valley, Utah · 32 km E of this epicentre
  3. 5.0 10 km NE of Marysvale, Utah · 37 km SE 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 38.7240, -112.4662. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Piute County, UT 52 km (32 mi) SE earthquakes near Piute County
Sevier County, UT 57 km (35 mi) E earthquakes near Sevier County
Millard County, UT 63 km (39 mi) WNW earthquakes near Millard County
Beaver County, UT 79 km (49 mi) WSW earthquakes near Beaver County
Sanpete County, UT 105 km (65 mi) NE earthquakes near Sanpete County
Juab County, UT 114 km (71 mi) NNW earthquakes near Juab County

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

Aftershocks so far

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

  1. 1.8 15 km NE of Milford, Utah
  2. 2.2 15 km NE of Milford, Utah
  3. 2.1 15 km NE of Milford, Utah
  4. 1.9 15 km NE of Milford, Utah
  5. 1.6 15 km NE of Milford, Utah
  6. 1.7 15 km NE of Milford, Utah
  7. 1.6 15 km NE of Milford, Utah
  8. 1.8 16 km NE of Milford, Utah
  9. 1.7 15 km NE of Milford, Utah
  10. 1.5 15 km NE of Milford, Utah
  11. 2.1 15 km NE of Milford, Utah
  12. 1.6 15 km NE of Milford, Utah
  13. 1.8 15 km NE of Milford, Utah
  14. 1.7 15 km NE of Milford, Utah
  15. 1.9 15 km NE of Milford, 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.