QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

28 km ENE of Boulder Town, Utah

Yes. A magnitude 3.1 earthquake was recorded 28 km ENE of Boulder Town, Utah, at 5:58 am MDT on 25 June 2020 (11:58 UTC), 20 km deep. 9 people have reported feeling it to USGS.

· 20 km deep · released about 1,500 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Wayne County 27 kmGarfield County 36 kmPiute County 92 kmSevier County 97 kmKane County 104 kmEmery County 113 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 3.1 (ml)
Depth
20 km below the surface
Felt
9 reports · strongest reported intensity III
Nearest
Wayne County, 27 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2259 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 38 km (24 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.

How big was it?

This earthquake released about 1,500 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,200× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

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 38.0460, -111.1432. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Wayne County, UT 27 km (17 mi) NNE earthquakes near Wayne County
Garfield County, UT 36 km (22 mi) SW earthquakes near Garfield County
Piute County, UT 92 km (57 mi) WNW earthquakes near Piute County
Sevier County, UT 97 km (60 mi) NW earthquakes near Sevier County
Kane County, UT 104 km (65 mi) SW earthquakes near Kane County
Emery County, UT 113 km (70 mi) NNE earthquakes near Emery County

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

Aftershocks so far

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

  1. 1.5 14 km SE of Torrey, Utah
  2. 1.7 30 km ESE of Escalante, Utah
  3. 1.7 19 km SSE of Boulder Town, Utah
  4. 2.1 27 km WNW of Boulder Town, Utah
  5. 1.6 28 km ENE of Torrey, Utah
  6. 2.4 31 km SE of Boulder Town, Utah
  7. 1.5 28 km E of Torrey, Utah
  8. 4.0 29 km ENE of Torrey, Utah
  9. 2.2 28 km E of Torrey, Utah
  10. 1.6 20 km SE of Boulder Town, Utah
  11. 2.6 28 km NE of Boulder Town, Utah
  12. 2.5 47 km NNW of Halls Crossing, Utah
  13. 3.5 26 km SSE of Boulder Town, Utah
  14. 2.9 23 km WNW of Hanksville, Utah
  15. 2.0 26 km SE of Boulder Town, 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.