QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Earthquake near Cedar City, UT

No earthquake was likely felt in Cedar City in the 24 hours to 4:15 am MST (11:15 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 1.5 earthquake was recorded 28 km (17 mi) south of Cedar City, UT, at 7:27 pm MDT on 16 October 2023 (01:27 UTC), 10 km deep.

USGS: Utah

56 km (35 mi) NE of St. George, UT

7:27 pm MDT, Oct 16, 2023 · · 10 km deep · released about 5.4 lb of TNT

10 km30 km60 km120 km N Washington County 38 kmIron County 55 kmBeaver County 103 kmKane 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
7:27 pm MDT on 16 October 2023 ()
Where
28 km (17 mi) south of Cedar City, UT · earthquakes near Cedar City
Magnitude
M 1.5 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Washington County, 38 km WSW
Nearest mapped fault
Hurricane fault, 9 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 1122 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 1 km (1 mi) from the epicentre. In Cedar City, 28 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: Toquerville, LaVerkin.

How big was it?

This earthquake released about 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 lists 2 earthquakes of M5 or more within 50 km:

  1. 6.3 Near Pine Valley, Utah · 34 km W of this epicentre
  2. 5.9 3 km SSE of Washington, Utah · 50 km SW 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 37.4333, -113.1215. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Washington County, UT 38 km (23 mi) WSW earthquakes near Washington County
Iron County, UT 55 km (34 mi) NNW earthquakes near Iron County
Beaver County, UT 103 km (64 mi) N earthquakes near Beaver County
Kane County, UT 117 km (73 mi) E earthquakes near Kane County
Piute County, UT 133 km (83 mi) NE earthquakes near Piute 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. 1.9 11 km NW of Enoch, Utah
  2. 1.6 6 km NNW of Enoch, Utah
  3. 1.6 8 km WNW of Enoch, Utah
  4. 1.8 11 km NW of Enoch, Utah
  5. 2.5 8 km NW of Enoch, Utah
  6. 2.0 9 km NW of Enoch, Utah
  7. 1.8 8 km WNW of Enoch, Utah
  8. 1.6 7 km NW of Enoch, Utah
  9. 1.6 9 km NW of Enoch, Utah
  10. 2.4 1 km S of Summit, Utah
  11. 2.0 1 km SSE of Summit, Utah
  12. 1.6 2 km SSW of Summit, Utah
  13. 1.8 1 km SSE of Summit, Utah
  14. 1.6 1 km SSE of Summit, Utah
  15. 2.4 1 km SSE of Summit, 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.