QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

9 km ENE of Hebgen Lake Estates, Montana

· 9.4 km deep · released about 1.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fremont County 73 kmGallatin County 79 kmPark County 85 kmMadison County 86 kmTeton County 100 kmClark County 116 kmTeton County 117 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 3.3 (ml)
Depth
9.4 km below the surface
Felt
23 reports · strongest reported intensity III
Nearest
Fremont County, 73 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3232 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 23 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,400× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× 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 44.8103, -111.0883. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fremont County, ID 73 km (45 mi) NNE of here earthquakes near Fremont County
Gallatin County, MT 79 km (49 mi) S of here earthquakes near Gallatin County
Park County, MT 85 km (53 mi) SSW of here earthquakes near Park County
Madison County, MT 86 km (54 mi) SE of here earthquakes near Madison County
Teton County, WY 100 km (62 mi) NNW of here earthquakes near Teton County
Clark County, ID 116 km (72 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

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

  1. 1.6 13 km E of Hebgen Lake Estates, Montana
  2. 1.9 11 km SW of West Yellowstone, Montana
  3. 1.5 25 km SSW of Mammoth, Wyoming
  4. 2.2 7 km SW of Hebgen Lake Estates, Montana
  5. 1.7 25 km SSW of Mammoth, Wyoming
  6. 1.6 24 km SSE of Mammoth, Wyoming
  7. 1.5 25 km S of Mammoth, Wyoming
  8. 2.0 19 km W of Hebgen Lake Estates, Montana
  9. 1.6 11 km E of Hebgen Lake Estates, Montana
  10. 2.0 Idaho-Montana border region
  11. 2.2 11 km NE of West Yellowstone, Montana
  12. 1.9 11 km NE of West Yellowstone, Montana
  13. 1.8 11 km NE of West Yellowstone, Montana
  14. 1.7 11 km NE of West Yellowstone, Montana
  15. 1.8 11 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 43 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.