QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Arizona

Yes. A magnitude 1.7 earthquake was recorded in Arizona, 25 km (16 mi) S of St. George, UT, at 8:56 am MDT on 7 June 2023 (14:56 UTC), 8.8 km deep.

25 km (16 mi) S of St. George, UT

· 8.8 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 46 kmIron County 120 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
Magnitude
M 1.7 (ml)
Depth
8.8 km below the surface
Felt
no reports yet
Nearest
Washington County, 46 km N
Nearest mapped fault
Washington fault, 2 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 1254 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 9 km (6 mi) from the epicentre. 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: Saint George.

How big was it?

This earthquake released about 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 92× the energy of this one
  4. This earthquake M 1.7 about 10 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 4.4 on 2022-09-19 — about 12,000 times the energy of this one.

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 N 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 36.8507, -113.5507. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Washington County, UT 46 km (29 mi) N earthquakes near Washington County
Iron County, UT 120 km (74 mi) N earthquakes near Iron County
Lincoln County, NV 145 km (90 mi) NW earthquakes near Lincoln County

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

Aftershocks so far

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

  1. 2.2 55 km ESE of Scenic, Arizona
  2. 1.6 28 km S of Scenic, Arizona
  3. 1.9 27 km S of Scenic, Arizona
  4. 1.5 26 km SSE of Scenic, Arizona
  5. 1.6 41 km SSE of Saint George, Utah
  6. 2.7 56 km SE of Scenic, Arizona
  7. 1.6 11 km NNE of Beaver Dam, Arizona
  8. 2.0 37 km SSE of Saint George, Utah
  9. 1.8 3 km SW of Saint George, Utah
  10. 1.8 13 km SSW of Saint George, Utah
  11. 2.9 10 km SSE of Washington, Utah
  12. 1.7 14 km NE of Beaver Dam, Arizona
  13. 1.7 13 km NE of Beaver Dam, Arizona
  14. 2.3 10 km N of Beaver Dam, Arizona
  15. 1.6 10 km W of Ivins, 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.