QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

29 km ESE of West Yellowstone, Montana

· 8.9 km deep · released about 1,500 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Teton County 65 kmFremont County 71 kmPark County 92 kmPark County 99 kmTeton County 99 kmGallatin County 108 kmMadison 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 3.1 (ml)
Depth
8.9 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Teton County, 65 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 932 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,500 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 220,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,900× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× more

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 44.5895, -110.7512. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Teton County, WY 65 km (41 mi) NNW of here earthquakes near Teton County
Fremont County, ID 71 km (44 mi) NE of here earthquakes near Fremont County
Park County, WY 92 km (57 mi) W of here earthquakes near Park County
Park County, MT 99 km (61 mi) S of here earthquakes near Park County
Teton County, ID 99 km (62 mi) NNE of here earthquakes near Teton County
Gallatin County, MT 108 km (67 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. 1.5 10 km ENE of Hebgen Lake Estates, Montana
  2. 3.0 10 km ENE of Hebgen Lake Estates, Montana
  3. 1.6 10 km ENE of Hebgen Lake Estates, Montana
  4. 1.7 20 km S of Mammoth, Wyoming
  5. 1.6 10 km S of West Yellowstone, Montana
  6. 1.5 7 km SW of Hebgen Lake Estates, Montana
  7. 1.6 37 km ESE of West Yellowstone, Montana
  8. 1.5 25 km SSE of West Yellowstone, Montana
  9. 1.6 14 km NE of West Yellowstone, Montana
  10. 2.3 49 km SE of West Yellowstone, Montana
  11. 2.7 5 km E of Hebgen Lake Estates, Montana
  12. 1.5 43 km SE of Mammoth, Wyoming
  13. 2.1 38 km SSE of Mammoth, Wyoming
  14. 2.6 38 km SSE of Mammoth, Wyoming
  15. 2.1 24 km SSW 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2017-06-16 — it released about 68 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.