QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8ml

11 km N of Pine Valley, Utah

· 8.7 km deep · released about 7.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 26 kmIron County 49 kmBeaver County 98 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 3.8 (ml)
Depth
8.7 km below the surface
Felt
52 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Washington County, 26 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2025 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 52 people have reported feeling it to USGS.

How big was it?

This earthquake released about 7.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 23,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 730× the energy of this one
  4. This earthquake M 3.8 about 7.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 15× 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.

Where

Epicentre 37.4948, -113.4887. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Washington County, UT 26 km (16 mi) N of here earthquakes near Washington County
Iron County, UT 49 km (30 mi) SSW of here earthquakes near Iron County
Beaver County, UT 98 km (61 mi) SSW of here earthquakes near Beaver County

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

Aftershocks so far

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

  1. 1.7 12 km WNW of Kanarraville, Utah
  2. 1.8 12 km N of New Harmony, Utah
  3. 1.6 12 km N of New Harmony, Utah
  4. 2.0 12 km WNW of Kanarraville, Utah
  5. 1.5 12 km WNW of Kanarraville, Utah
  6. 2.0 4 km WNW of Washington, Utah
  7. 1.5 15 km SE of Kanarraville, Utah
  8. 2.7 10 km N of Springdale, Utah
  9. 1.5 11 km WSW of Veyo, Utah
  10. 1.7 18 km WNW of Cedar City, Utah
  11. 1.5 14 km SE of Kanarraville, Utah
  12. 1.5 12 km N of Pine Valley, Utah
  13. 1.7 32 km NNE of Newcastle, Utah
  14. 1.8 8 km NW of Cedar City, Utah
  15. 1.7 13 km SSE of Kanarraville, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.2 on 2016-01-15 — it released about 4.7 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.