QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

29 km NE of Boulder, Wyoming

· 5.0 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sublette County 41 kmFremont County 72 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
5.0 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Sublette County, 41 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1790 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 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 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 42.9500, -109.4807. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sublette County, WY 41 km (25 mi) ENE of here earthquakes near Sublette County
Fremont County, WY 72 km (45 mi) W of here earthquakes near Fremont County
Hot Springs County, WY 120 km (75 mi) SW of here earthquakes near Hot Springs County
Lincoln County, WY 127 km (79 mi) NE of here earthquakes near Lincoln County

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

Aftershocks so far

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

  1. 2.6 20 km ENE of Pinedale, Wyoming
  2. 2.9 25 km SW of Fort Washakie, Wyoming
  3. 2.3 22 km S of Dubois, Wyoming
  4. 2.7 26 km WSW of Lander, Wyoming
  5. 2.5 33 km SSW of Dubois, Wyoming
  6. 1.8 33 km SSW of Dubois, Wyoming

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.