QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

25 km ESE of Mammoth, Wyoming

· 11 km deep · released about 570 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Park County 67 kmPark County 78 kmTeton County 90 kmGallatin County 93 kmFremont County 110 kmSweet Grass County 112 kmCarbon 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 2.9 (ml)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Park County, 67 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2867 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 570 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 27,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.9 about 570 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 44.8608, -110.4288. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Park County, MT 67 km (42 mi) S of here earthquakes near Park County
Park County, WY 78 km (48 mi) WNW of here earthquakes near Park County
Teton County, WY 90 km (56 mi) N of here earthquakes near Teton County
Gallatin County, MT 93 km (58 mi) SE of here earthquakes near Gallatin County
Fremont County, ID 110 km (68 mi) NE of here earthquakes near Fremont County
Sweet Grass County, MT 112 km (70 mi) SSW of here earthquakes near Sweet Grass County

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

Aftershocks so far

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

  1. 1.6 11 km ESE of West Yellowstone, Montana
  2. 1.6 39 km SSE of Mammoth, Wyoming
  3. 2.0 39 km SSE of Mammoth, Wyoming
  4. 1.9 39 km SSE of Mammoth, Wyoming
  5. 2.4 51 km SSW of Silver Gate, Montana
  6. 1.7 39 km SSE of Mammoth, Wyoming
  7. 2.8 30 km SW of Silver Gate, Montana
  8. 2.6 34 km SW of Silver Gate, Montana
  9. 2.6 36 km SW of Silver Gate, Montana
  10. 2.8 34 km SW of Silver Gate, Montana
  11. 2.3 34 km SW of Silver Gate, Montana
  12. 2.0 33 km SW of Silver Gate, Montana
  13. 2.4 34 km SW of Silver Gate, Montana
  14. 1.9 38 km SSE of Mammoth, Wyoming
  15. 1.6 48 km SSE of Mammoth, 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.