QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

14 km E of Hebgen Lake Estates, Montana

· 5.2 km deep · released about 430 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fremont County 74 kmGallatin County 82 kmPark County 84 kmMadison County 93 kmTeton County 94 kmTeton County 115 kmPark County 116 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 2.8 (ml)
Depth
5.2 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Fremont County, 74 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3278 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 430 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 35,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 25,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.2× the energy of this one
  4. This earthquake M 2.8 about 430 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 44.7863, -111.0062. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fremont County, ID 74 km (46 mi) NNE of here earthquakes near Fremont County
Gallatin County, MT 82 km (51 mi) S of here earthquakes near Gallatin County
Park County, MT 84 km (52 mi) SSW of here earthquakes near Park County
Madison County, MT 93 km (58 mi) SE of here earthquakes near Madison County
Teton County, WY 94 km (58 mi) NNW of here earthquakes near Teton County
Teton County, ID 115 km (72 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

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

  1. 1.6 13 km NE of West Yellowstone, Montana
  2. 1.8 17 km NE of West Yellowstone, Montana
  3. 1.7 13 km NE of West Yellowstone, Montana
  4. 1.8 14 km NE of West Yellowstone, Montana
  5. 2.0 13 km NE of West Yellowstone, Montana
  6. 1.6 13 km NE of West Yellowstone, Montana
  7. 2.2 14 km NE of West Yellowstone, Montana
  8. 2.3 14 km NE of West Yellowstone, Montana
  9. 1.5 14 km NE of West Yellowstone, Montana
  10. 1.7 14 km NE of West Yellowstone, Montana
  11. 2.0 Wyoming
  12. 1.5 Wyoming
  13. 2.3 14 km NE of West Yellowstone, Montana
  14. 1.7 Wyoming
  15. 1.7 12 km E 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 240 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.