QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

39 km WNW of Cody, Wyoming

· 9.0 km deep · released about 5.9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Park County 18 kmCarbon County 75 kmTeton County 98 kmStillwater 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 1.5 (ml)
Depth
9.0 km below the surface
Felt
no reports yet
Nearest
Park County, 18 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1697 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 44.6458, -109.5205. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Park County, WY 18 km (11 mi) NNE of here earthquakes near Park County
Carbon County, MT 75 km (47 mi) SSW of here earthquakes near Carbon County
Teton County, WY 98 km (61 mi) NE of here earthquakes near Teton County
Stillwater County, MT 113 km (70 mi) S of here earthquakes near Stillwater County
Park County, MT 121 km (75 mi) SE of here earthquakes near Park County
Hot Springs County, WY 134 km (84 mi) NW of here earthquakes near Hot Springs County

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

Aftershocks so far

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

  1. 1.5 37 km S of Silver Gate, Montana
  2. 1.8 34 km S of Silver Gate, Montana
  3. 1.9 24 km S of Silver Gate, Montana
  4. 2.0 24 km SSW of Silver Gate, Montana
  5. 2.0 37 km S of Silver Gate, Montana
  6. 2.0 36 km S of Silver Gate, Montana
  7. 1.9 37 km S of Silver Gate, Montana
  8. 2.4 37 km S of Silver Gate, Montana
  9. 2.1 38 km S of Silver Gate, Montana
  10. 2.0 34 km S of Silver Gate, Montana
  11. 1.8 36 km S of Silver Gate, Montana
  12. 1.7 40 km S of Silver Gate, Montana
  13. 1.6 36 km S of Silver Gate, Montana
  14. 1.9 41 km S of Silver Gate, Montana
  15. 1.7 36 km S of Silver Gate, Montana

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.