QuakeIndex

Earthquake · reviewed by a seismologist

M 4.3ml

45 km W of Hebgen Lake Estates, Montana

· 9.9 km deep · released about 49 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fremont County 61 kmMadison County 67 kmClark County 68 kmGallatin County 99 kmBeaverhead County 100 kmMadison County 105 kmJefferson County 113 kmTeton 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 4.3 (ml)
Depth
9.9 km below the surface
Felt
3 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
USGS impact alert
green
Nearest
Fremont County, 61 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1556 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 49 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 3,500× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 150× the energy of this one
  3. Magna, Utah 2020 M 5.7 110× the energy of this one
  4. This earthquake M 4.3 about 49 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 100× 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 44.7302, -111.7637. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fremont County, ID 61 km (38 mi) NNW of here earthquakes near Fremont County
Madison County, MT 67 km (42 mi) S of here earthquakes near Madison County
Clark County, ID 68 km (42 mi) NE of here earthquakes near Clark County
Gallatin County, MT 99 km (62 mi) SSW of here earthquakes near Gallatin County
Beaverhead County, MT 100 km (62 mi) ESE of here earthquakes near Beaverhead County
Madison County, ID 105 km (65 mi) N 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. 1.8 34 km SSE of Virginia City, Montana
  2. 2.2 37 km SSE of Virginia City, Montana
  3. 2.1 43 km NE of Spencer, Idaho
  4. 1.6 28 km SSE of Virginia City, Montana
  5. 1.7 40 km NNE of Spencer, Idaho
  6. 1.9 11 km SW of West Yellowstone, Montana
  7. 2.2 7 km SW of Hebgen Lake Estates, Montana
  8. 2.0 33 km N of Spencer, Idaho
  9. 2.4 42 km NNE of Spencer, Idaho
  10. 2.0 19 km W of Hebgen Lake Estates, Montana
  11. 1.6 41 km NNE of Spencer, Idaho
  12. 2.0 Idaho-Montana border region
  13. 1.7 6 km SW of Hebgen Lake Estates, Montana
  14. 2.0 29 km NNE of Spencer, Idaho
  15. 1.7 28 km SSE of Virginia City, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.