QuakeIndex

Earthquake · reviewed by a seismologist

M 4.5ml

Earthquake near Cedar City, UT

No earthquake was likely felt in Cedar City in the 24 hours to 12:06 am MST (07:06 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 4.5 earthquake was recorded 29 km (18 mi) southeast of Cedar City, UT, at 11:29 pm MDT on 28 July 2024 (05:29 UTC), 20 km deep. 3,623 people have reported feeling it to USGS.

USGS: 24 km S of Brian Head, Utah

78 km (48 mi) NE of St. George, UT

11:29 pm MDT, Jul 28, 2024 · · 20 km deep · released about 76 tons of TNT

Every earthquake near Cedar City Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 61 kmIron County 63 kmKane County 94 kmBeaver County 104 kmPiute County 115 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
11:29 pm MDT on 28 July 2024 ()
Where
29 km (18 mi) southeast of Cedar City, UT · earthquakes near Cedar City
Magnitude
M 4.5 (ml)
Depth
20 km below the surface
Felt
3,623 reports · strongest reported intensity VI
Measured shaking
intensity V (ShakeMap)
USGS impact alert
green
Nearest
Washington County, 61 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 120 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

At this magnitude and depth, people at rest would likely notice it out to about 135 km (84 mi) from the epicentre. In Cedar City, 29 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: Cedar City 29 km, intensity III · Enoch 37 km, intensity III. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 76 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 2,200× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 99× the energy of this one
  3. Magna, Utah 2020 M 5.7 70× the energy of this one
  4. This earthquake M 4.5 about 76 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 160× 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 (31 mi) since our catalogue begins in 2016. No other earthquake of M4 or more has been recorded this close in that time.

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 37.4725, -112.8523. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Washington County, UT 61 km (38 mi) WSW earthquakes near Washington County
Iron County, UT 63 km (39 mi) NW earthquakes near Iron County
Kane County, UT 94 km (59 mi) ESE earthquakes near Kane County
Beaver County, UT 104 km (65 mi) NNW earthquakes near Beaver County
Piute County, UT 115 km (71 mi) NNE earthquakes near Piute County

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

Aftershocks so far

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

  1. 1.9 9 km E of Springdale, Utah
  2. 1.7 11 km ENE of Kanarraville, Utah
  3. 1.5 13 km ENE of Hildale, Utah
  4. 1.6 25 km S of Brian Head, Utah
  5. 1.7 10 km E of Springdale, Utah
  6. 1.7 12 km SSW of Orderville, Utah
  7. 1.7 10 km N of Alton, Utah
  8. 1.7 9 km E of Springdale, Utah
  9. 1.7 6 km WSW of Panguitch, Utah
  10. 2.5 9 km S of Cedar City, Utah
  11. 2.7 10 km NE of Hildale, Utah
  12. 1.8 3 km NE of Cedar City, Utah
  13. 1.7 5 km SE of Springdale, Utah
  14. 1.6 5 km N of Cedar City, Utah
  15. 1.5 13 km WNW of Cedar City, 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.