QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

25 km SSE of West Yellowstone, Montana

· 9.2 km deep · released about 5.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fremont County 45 kmTeton County 64 kmTeton County 77 kmMadison County 89 kmClark County 108 kmPark 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
9.2 km below the surface
Felt
no reports yet
Nearest
Fremont County, 45 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 926 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 5.7 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 2,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.7 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 44.4417, -111.0113. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fremont County, ID 45 km (28 mi) ENE of here earthquakes near Fremont County
Teton County, WY 64 km (40 mi) NW of here earthquakes near Teton County
Teton County, ID 77 km (48 mi) NNE of here earthquakes near Teton County
Madison County, ID 89 km (55 mi) NE of here earthquakes near Madison County
Clark County, ID 108 km (67 mi) E of here earthquakes near Clark County
Park County, WY 113 km (70 mi) W of here earthquakes near Park County

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

Aftershocks so far

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

  1. 1.7 4 km E of Hebgen Lake Estates, Montana
  2. 1.8 3 km S of West Yellowstone, Montana
  3. 1.8 20 km S of Mammoth, Wyoming
  4. 1.9 6 km E of Hebgen Lake Estates, Montana
  5. 1.6 5 km E of Hebgen Lake Estates, Montana
  6. 1.6 7 km ESE of Hebgen Lake Estates, Montana
  7. 2.1 6 km NNW of West Yellowstone, Montana
  8. 1.9 21 km S of Mammoth, Wyoming
  9. 2.2 43 km SE of West Yellowstone, Montana
  10. 2.0 4 km NNW of West Yellowstone, Montana
  11. 2.6 3 km NW of West Yellowstone, Montana
  12. 1.9 31 km ESE of Island Park, Idaho
  13. 2.0 13 km NNE of West Yellowstone, Montana
  14. 2.3 12 km NNE of West Yellowstone, Montana
  15. 1.5 21 km NE of West Yellowstone, 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.