QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

49 km SSE of Mammoth, Wyoming

· 4.4 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Teton County 60 kmPark County 63 kmFremont County 97 kmPark County 98 kmTeton County 114 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 1.8 (ml)
Depth
4.4 km below the surface
Felt
no reports yet
Nearest
Teton County, 60 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2565 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 44.5908, -110.3800. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Teton County, WY 60 km (38 mi) N of here earthquakes near Teton County
Park County, WY 63 km (39 mi) W of here earthquakes near Park County
Fremont County, ID 97 km (60 mi) ENE of here earthquakes near Fremont County
Park County, MT 98 km (61 mi) S of here earthquakes near Park County
Teton County, ID 114 km (71 mi) NE of here earthquakes near Teton County
Gallatin County, MT 120 km (75 mi) SSE of here earthquakes near Gallatin County

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

Aftershocks so far

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

  1. 1.7 40 km SSE of Mammoth, Wyoming
  2. 1.6 21 km S of Mammoth, Wyoming
  3. 1.7 22 km S of Mammoth, Wyoming
  4. 1.7 20 km S of Mammoth, Wyoming
  5. 1.5 50 km ESE of West Yellowstone, Montana
  6. 1.6 46 km SE of Mammoth, Wyoming
  7. 2.8 36 km S of Silver Gate, Montana
  8. 2.1 Wyoming
  9. 1.6 22 km SE of Mammoth, Wyoming
  10. 2.1 27 km S of Mammoth, Wyoming
  11. 1.5 58 km SSE of Mammoth, Wyoming
  12. 1.7 20 km SSW of Mammoth, Wyoming
  13. 2.1 56 km SSE of Mammoth, Wyoming
  14. 1.6 40 km SSE of Mammoth, Wyoming
  15. 1.6 39 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.