QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

7 km SW of Guernsey, Wyoming

· 5.0 km deep · released about 950 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Platte County 15 kmGoshen County 40 kmSioux County 93 kmAlbany County 97 kmNiobrara County 98 kmScotts Bluff County 100 kmConverse County 103 kmLaramie County 104 kmBanner County 117 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 3.0 (ml)
Depth
5.0 km below the surface
Felt
19 reports · strongest reported intensity III
Nearest
Platte County, 15 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3109 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 19 people have reported feeling it to USGS.

How big was it?

This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 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.

Where

Epicentre 42.2206, -104.8104. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Platte County, WY 15 km (10 mi) NE of here earthquakes near Platte County
Goshen County, WY 40 km (25 mi) WNW of here earthquakes near Goshen County
Sioux County, NE 93 km (58 mi) WSW of here earthquakes near Sioux County
Albany County, WY 97 km (61 mi) NE of here earthquakes near Albany County
Niobrara County, WY 98 km (61 mi) SSW of here earthquakes near Niobrara County
Scotts Bluff County, NE 100 km (62 mi) WNW of here earthquakes near Scotts Bluff County

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

Aftershocks so far

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

  1. 2.6 9 km ENE of Glendo, Wyoming
  2. 2.7 19 km ENE of Hartville, 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.