QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

5 km ESE of Hebgen Lake Estates, Montana

· 9.3 km deep · released about 1,200 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fremont County 65 kmGallatin County 86 kmMadison County 89 kmPark County 93 kmTeton County 96 kmClark County 109 kmTeton County 110 kmMadison 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 3.1 (ml)
Depth
9.3 km below the surface
Felt
205 reports · strongest reported intensity VI
Nearest
Fremont County, 65 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1561 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 205 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,200 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 6.7 290,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,100× the energy of this one
  4. This earthquake M 3.1 about 1,200 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.2× 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 44.7447, -111.1360. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fremont County, ID 65 km (40 mi) NNE of here earthquakes near Fremont County
Gallatin County, MT 86 km (53 mi) S of here earthquakes near Gallatin County
Madison County, MT 89 km (55 mi) SE of here earthquakes near Madison County
Park County, MT 93 km (58 mi) SSW of here earthquakes near Park County
Teton County, WY 96 km (60 mi) NW of here earthquakes near Teton County
Clark County, ID 109 km (68 mi) ENE of here earthquakes near Clark 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. 1.6 41 km ESE of West Yellowstone, Montana
  2. 1.6 42 km ESE of West Yellowstone, Montana
  3. 2.1 42 km ESE of West Yellowstone, Montana
  4. 1.7 19 km ENE of West Yellowstone, Montana
  5. 1.7 18 km ENE of West Yellowstone, Montana
  6. 2.8 19 km ENE of West Yellowstone, Montana
  7. 1.6 18 km ENE of West Yellowstone, Montana
  8. 1.6 18 km ENE of West Yellowstone, Montana
  9. 1.8 19 km ENE of West Yellowstone, Montana
  10. 1.5 16 km SSE of West Yellowstone, Montana
  11. 2.2 4 km SSE of Hebgen Lake Estates, Montana
  12. 2.8 16 km SSW of Mammoth, Wyoming
  13. 1.6 26 km ENE of West Yellowstone, Montana
  14. 1.7 24 km ENE of West Yellowstone, Montana
  15. 1.7 25 km ENE 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 89 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.