QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

30 km S of Silver Gate, Montana

· 8.0 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Park County 43 kmTeton County 82 kmPark County 91 kmCarbon County 96 kmStillwater County 115 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 (md)
Depth
8.0 km below the surface
Felt
no reports yet
Nearest
Park County, 43 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2798 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 13 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× the energy of this one
  4. This earthquake M 1.8 about 13 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 44.7295, -110.0295. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Park County, WY 43 km (27 mi) NW of here earthquakes near Park County
Teton County, WY 82 km (51 mi) NNE of here earthquakes near Teton County
Park County, MT 91 km (56 mi) SSE of here earthquakes near Park County
Carbon County, MT 96 km (60 mi) SW of here earthquakes near Carbon County
Stillwater County, MT 115 km (72 mi) SSW of here earthquakes near Stillwater County
Gallatin County, MT 125 km (78 mi) SE of here earthquakes near Gallatin County

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

Aftershocks so far

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

  1. 2.1 43 km SSE of Mammoth, Wyoming
  2. 1.9 48 km ESE of West Yellowstone, Montana
  3. 1.6 50 km SSW of Silver Gate, Montana
  4. 2.0 50 km SSE of Mammoth, Wyoming
  5. 1.5 38 km S of Silver Gate, Montana
  6. 1.8 49 km SSE of Mammoth, Wyoming
  7. 1.6 39 km SSE of Mammoth, Wyoming
  8. 1.6 41 km SSE of Mammoth, Wyoming
  9. 1.7 56 km SSW of Silver Gate, Montana
  10. 2.1 51 km SE of Mammoth, Wyoming
  11. 1.7 54 km SSE of Mammoth, Wyoming
  12. 1.9 35 km S of Silver Gate, Montana
  13. 1.9 58 km SSE of Mammoth, Wyoming
  14. 1.8 58 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.