QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Earthquake near Richfield, UT

No earthquake was likely felt in Richfield in the 24 hours to 11:21 pm MST (06:21 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 1.6 earthquake was recorded 41 km (25 mi) south of Richfield, UT, at 3:02 am MDT on 22 May 2024 (09:02 UTC), 5.9 km deep.

USGS: 9 km ESE of Marysvale, Utah

3:02 am MDT, May 22, 2024 · · 5.9 km deep · released about 7.6 lb of TNT

10 km30 km60 km120 km N Piute County 8 kmSevier County 47 kmGarfield County 88 kmBeaver County 96 kmWayne County 102 kmMillard County 106 kmIron County 116 kmSanpete County 118 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
3:02 am MDT on 22 May 2024 ()
Where
41 km (25 mi) south of Richfield, UT · earthquakes near Richfield
Magnitude
M 1.6 (ml)
Depth
5.9 km below the surface
Felt
no reports yet
Nearest
Piute County, 8 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 904 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 10 km (6 mi) from the epicentre. In Richfield, 41 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: Monroe.

How big was it?

This earthquake released about 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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

The largest earthquake within 50 km since 2016 was M 4.4 on 2020-10-03 — about 17,000 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 · 25 km WNW of this epicentre
  2. 5.2 0 km SSW of Central Valley, Utah · 33 km N of this epicentre
  3. 5.0 10 km NE of Marysvale, Utah · 12 km N 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 38.4067, -112.1395. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Piute County, UT 8 km (5 mi) S earthquakes near Piute County
Sevier County, UT 47 km (29 mi) NE earthquakes near Sevier County
Garfield County, UT 88 km (55 mi) SE earthquakes near Garfield County
Beaver County, UT 96 km (60 mi) W earthquakes near Beaver County
Wayne County, UT 102 km (63 mi) E earthquakes near Wayne County
Millard County, UT 106 km (66 mi) NW earthquakes near Millard County

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

Aftershocks so far

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

  1. 2.3 24 km SSW of Kanosh, Utah
  2. 2.0 28 km SW of Kanosh, Utah
  3. 1.9 5 km NE of Koosharem, Utah
  4. 2.0 2 km WNW of Circleville, Utah
  5. 2.0 19 km SW of Circleville, Utah
  6. 2.4 0 km E of Beaver, Utah
  7. 1.6 22 km SW of Kanosh, Utah
  8. 1.8 9 km SW of Kanosh, Utah
  9. 1.8 8 km SSE of Joseph, Utah
  10. 1.9 23 km SSW of Kanosh, Utah
  11. 1.5 22 km SSW of Kanosh, Utah
  12. 1.5 25 km SW of Kanosh, Utah
  13. 2.1 6 km SSE of Joseph, Utah
  14. 2.1 8 km SSE of Joseph, Utah
  15. 2.2 18 km WNW of Marysvale, 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.