QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

Earthquake near Richfield, UT

No earthquake was likely felt in Richfield in the 24 hours to 4:59 am MST (11:59 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 2.4 earthquake was recorded 47 km (29 mi) west-southwest of Richfield, UT, at 7:55 pm MST on 21 February 2019 (02:55 UTC), less than 1 km deep.

USGS: 20 km SW of Kanosh, Utah

7:55 pm MST, Feb 21, 2019 · · -0.7 km deep · released about 130 lb of TNT

Every earthquake near Richfield Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Millard County 54 kmPiute County 57 kmBeaver County 65 kmSevier County 70 kmIron County 105 kmJuab 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
7:55 pm MST on 21 February 2019 ()
Where
47 km (29 mi) west-southwest of Richfield, UT · earthquakes near Richfield
Magnitude
M 2.4 (ml)
Depth
-0.7 km below the surface
Felt
no reports yet
Nearest
Millard County, 54 km NW
Nearest mapped fault
Beaver Basin faults, 20 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 2821 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 21 km (13 mi) from the epicentre. In Richfield, 47 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.

How big was it?

This earthquake released about 130 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 120,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 83,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.4× the energy of this one
  4. This earthquake M 2.4 about 130 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 4.0 on 2019-02-20 — about 270 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 · 28 km SE of this epicentre
  2. 5.2 0 km SSW of Central Valley, Utah · 45 km E of this epicentre
  3. 5.0 10 km NE of Marysvale, Utah · 46 km ESE 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 38.6830, -112.6175. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Millard County, UT 54 km (34 mi) NW earthquakes near Millard County
Piute County, UT 57 km (36 mi) SE earthquakes near Piute County
Beaver County, UT 65 km (40 mi) WSW earthquakes near Beaver County
Sevier County, UT 70 km (44 mi) E earthquakes near Sevier County
Iron County, UT 105 km (65 mi) SW earthquakes near Iron County
Juab County, UT 116 km (72 mi) N earthquakes near Juab County

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

Aftershocks so far

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

  1. 2.0 10 km NNE of Minersville, Utah
  2. 2.4 11 km NNE of Minersville, Utah
  3. 1.6 13 km SW of Kanosh, Utah
  4. 2.8 10 km NNE of Minersville, Utah
  5. 1.6 9 km NNE of Minersville, Utah
  6. 1.7 10 km NE of Minersville, Utah
  7. 1.7 11 km NNE of Minersville, UT
  8. 3.9 10 km NNE of Minersville, Utah
  9. 1.9 19 km ENE of Milford, Utah
  10. 2.0 3 km ESE of Beaver, Utah
  11. 2.1 4 km ENE of Beaver, Utah
  12. 2.3 6 km SSE of Joseph, Utah
  13. 1.7 6 km SSE of Joseph, Utah
  14. 1.6 14 km SW of Kanosh, Utah
  15. 1.6 4 km SW of Beaver, 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.