QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

6 km NNE of West Yellowstone, Montana

· 10 km deep · released about 5.9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fremont County 64 kmGallatin County 90 kmTeton County 90 kmPark County 93 kmMadison County 95 kmTeton County 107 kmClark County 112 kmMadison County 113 kmPark County 120 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
10 km below the surface
Felt
no reports yet
Nearest
Fremont County, 64 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 496 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 44.7145, -111.0720. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fremont County, ID 64 km (40 mi) NNE of here earthquakes near Fremont County
Gallatin County, MT 90 km (56 mi) S of here earthquakes near Gallatin County
Teton County, WY 90 km (56 mi) NW of here earthquakes near Teton County
Park County, MT 93 km (58 mi) SSW of here earthquakes near Park County
Madison County, MT 95 km (59 mi) SE of here earthquakes near Madison County
Teton County, ID 107 km (66 mi) N of here earthquakes near Teton 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. 1.7 23 km NE of West Yellowstone, Montana
  2. 1.5 21 km SSW of Mammoth, Wyoming
  3. 1.7 27 km W of Hebgen Lake Estates, Montana
  4. 1.8 24 km SSW of Mammoth, Wyoming
  5. 2.1 22 km SSW of Mammoth, Wyoming
  6. 1.6 36 km SE of West Yellowstone, Montana
  7. 1.7 14 km WNW of Hebgen Lake Estates, Montana
  8. 1.5 23 km SW of Mammoth, Wyoming
  9. 1.7 22 km SSW of Mammoth, Wyoming
  10. 1.7 22 km SSW of Mammoth, Wyoming
  11. 1.6 23 km SW of Mammoth, Wyoming
  12. 2.0 30 km ESE of West Yellowstone, Montana
  13. 1.7 30 km ESE of West Yellowstone, Montana
  14. 1.8 30 km ESE of West Yellowstone, Montana
  15. 1.7 27 km W of Hebgen Lake Estates, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2017-06-16 — it released about 18,000 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.