QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

12 km SE of West Yellowstone, Montana

· 8.9 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fremont County 58 kmTeton County 75 kmTeton County 95 kmPark County 103 kmGallatin County 104 kmMadison County 105 kmMadison County 109 kmPark County 110 kmClark 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 1.5 (ml)
Depth
8.9 km below the surface
Felt
no reports yet
Nearest
Fremont County, 58 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 300 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 5.4 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 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 44.5953, -110.9798. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fremont County, ID 58 km (36 mi) NE of here earthquakes near Fremont County
Teton County, WY 75 km (47 mi) NW of here earthquakes near Teton County
Teton County, ID 95 km (59 mi) N of here earthquakes near Teton County
Park County, MT 103 km (64 mi) SSW of here earthquakes near Park County
Gallatin County, MT 104 km (64 mi) S of here earthquakes near Gallatin County
Madison County, ID 105 km (65 mi) NNE of here earthquakes near Madison 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. 1.5 14 km ENE of Hebgen Lake Estates, Montana
  2. 1.6 14 km ENE of Hebgen Lake Estates, Montana
  3. 2.3 17 km NE of West Yellowstone, Montana
  4. 1.7 25 km SE of Mammoth, Wyoming
  5. 1.6 29 km ESE of West Yellowstone, Montana
  6. 2.1 46 km ENE of Warm River, Idaho
  7. 1.8 20 km NE of West Yellowstone, Montana
  8. 2.1 1 km SW of Hebgen Lake Estates, Montana
  9. 1.6 44 km ENE of Warm River, Idaho
  10. 2.0 10 km WSW of Hebgen Lake Estates, Montana
  11. 2.5 22 km S of Mammoth, Wyoming
  12. 1.7 18 km ENE of Hebgen Lake Estates, Montana
  13. 1.8 22 km SSW of Mammoth, Wyoming
  14. 2.0 45 km ENE of Warm River, Idaho
  15. 1.6 23 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 19,000 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.