QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

Earthquake near Cedar City, UT

No earthquake was likely felt in Cedar City in the 24 hours to 12:33 am MST (07:33 UTC). The last one was M 2.2, 16 km (10 mi) N, at 10:46 am MST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Cedar City

This page: a magnitude 3.0 earthquake was recorded 15 km (10 mi) northeast of Cedar City, UT, at 11:45 pm MDT on 7 April 2021 (05:45 UTC), 1.3 km deep. 26 people have reported feeling it to USGS.

USGS: 2 km SSW of Summit, Utah

96 km (60 mi) NE of St. George, UT

11:45 pm MDT, Apr 7, 2021 · · 1.3 km deep · released about 1,000 lb of TNT

Every earthquake near Cedar City Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Iron County 35 kmBeaver County 69 kmWashington County 75 kmPiute County 94 kmKane County 114 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
11:45 pm MDT on 7 April 2021 ()
Where
15 km (10 mi) northeast of Cedar City, UT · earthquakes near Cedar City
Magnitude
M 3.0 (ml)
Depth
1.3 km below the surface
Felt
26 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Iron County, 35 km WNW
Nearest mapped fault
Cedar City-Parowan monocline (and faults), under 1 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 836 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 38 km (24 mi) from the epicentre. In Cedar City, 15 km away, the estimate is intensity III (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: Enoch 7 km, intensity III · Cedar City 15 km, intensity III. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,000 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 330,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 15,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 10,000× the energy of this one
  4. This earthquake M 3.0 about 1,000 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 37.7803, -112.9438. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Iron County, UT 35 km (22 mi) WNW earthquakes near Iron County
Beaver County, UT 69 km (43 mi) NNW earthquakes near Beaver County
Washington County, UT 75 km (47 mi) SW earthquakes near Washington County
Piute County, UT 94 km (59 mi) NE earthquakes near Piute County
Kane County, UT 114 km (71 mi) ESE earthquakes near Kane County
Sevier County, UT 146 km (91 mi) NE earthquakes near Sevier 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. 2.4 10 km WNW of Panguitch, Utah
  2. 2.0 20 km SE of Kanarraville, Utah
  3. 1.7 20 km SE of Kanarraville, Utah
  4. 1.8 20 km SE of Kanarraville, Utah
  5. 2.3 21 km ESE of Kanarraville, Utah
  6. 1.6 22 km SE of Kanarraville, Utah
  7. 1.6 21 km SE of Kanarraville, Utah
  8. 2.3 21 km ESE of Kanarraville, Utah
  9. 3.1 20 km ESE of Kanarraville, Utah
  10. 2.1 21 km ESE of Kanarraville, Utah
  11. 1.6 9 km WNW of Panguitch, Utah
  12. 1.5 12 km S of Cedar City, Utah
  13. 2.0 9 km WNW of Panguitch, Utah
  14. 2.8 9 km WNW of Panguitch, Utah
  15. 2.0 10 km WNW of Panguitch, 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.