QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

Earthquake near Saint George, UT

No earthquake was likely felt in Saint George in the 24 hours to 10:02 am MST (17:02 UTC). The last one was M 4.0, 95 km (59 mi) W, at 1:16 am MDT on 6 June 2025, estimated intensity II (weak) in town; 37 felt reports to USGS. Every earthquake near Saint George

This page: a magnitude 2.7 earthquake was recorded 32 km (20 mi) south-southeast of Saint George, UT, at 8:52 am MDT on 24 July 2020 (14:52 UTC), 14 km deep. 1 person has reported feeling it to USGS.

USGS: 31 km SSE of Saint George, Utah

29 km (18 mi) SSE of St. George, UT

8:52 am MDT, Jul 24, 2020 · · 14 km deep · released about 360 lb of TNT

Every earthquake near Saint George Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 46 kmIron 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
8:52 am MDT on 24 July 2020 ()
Where
32 km (20 mi) south-southeast of Saint George, UT · earthquakes near Saint George
Magnitude
M 2.7 (ml)
Depth
14 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Washington County, 46 km N
Nearest mapped fault
Hurricane fault, 7 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 2232 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 21 km (13 mi) from the epicentre. In Saint George, 32 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 360 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 42,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 30,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.6× the energy of this one
  4. This earthquake M 2.7 about 360 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 one earthquake of M5 or more within 50 km:

  1. 5.9 3 km SSE of Washington, Utah · 28 km NNW 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 36.8537, -113.4160. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Washington County, UT 46 km (29 mi) N earthquakes near Washington County
Iron County, UT 118 km (73 mi) N earthquakes near Iron County

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

Aftershocks so far

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

  1. 1.6 37 km S of Saint George, Utah
  2. 1.8 2 km ESE of Colorado City, Arizona
  3. 2.1 2 km ESE of Colorado City, Arizona
  4. 1.6 2 km ESE of Hildale, Utah
  5. 3.8 3 km ESE of Colorado City, Arizona
  6. 2.3 10 km SW of Centennial Park, Arizona
  7. 1.6 46 km SSE of Saint George, Utah
  8. 4.4 45 km ESE of Littlefield, Arizona
  9. 2.1 5 km NNW of Hildale, Utah
  10. 2.1 1 km N of Cane Beds, Arizona
  11. 1.7 14 km WSW of Santa Clara, Utah
  12. 1.5 3 km NW of Leeds, Utah
  13. 2.2 27 km S of Saint George, Utah
  14. 1.6 20 km S of Centennial Park, Arizona
  15. 1.9 53 km ESE of Scenic, Arizona

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.