QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

42 km W of Hebgen Lake Estates, Montana

· 10 km deep · released about 52 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fremont County 63 kmMadison County 65 kmClark County 72 kmGallatin County 95 kmBeaverhead County 101 kmMadison County 108 kmJefferson County 117 kmTeton County 118 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 2.2 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Fremont County, 63 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2217 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 52 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 290,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 52 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 44.7582, -111.7253. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fremont County, ID 63 km (39 mi) NNW of here earthquakes near Fremont County
Madison County, MT 65 km (40 mi) SSE of here earthquakes near Madison County
Clark County, ID 72 km (45 mi) NE of here earthquakes near Clark County
Gallatin County, MT 95 km (59 mi) SSW of here earthquakes near Gallatin County
Beaverhead County, MT 101 km (63 mi) ESE of here earthquakes near Beaverhead County
Madison County, ID 108 km (67 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. 1.6 41 km S of Virginia City, Montana
  2. 2.3 8 km SSW of Hebgen Lake Estates, Montana
  3. 1.8 7 km SSW of Hebgen Lake Estates, Montana
  4. 1.7 31 km N of Spencer, Idaho
  5. 1.6 20 km W of Hebgen Lake Estates, Montana
  6. 2.1 25 km WNW of Hebgen Lake Estates, Montana
  7. 1.7 42 km NNE of Spencer, Idaho
  8. 1.9 32 km N of Spencer, Idaho
  9. 2.0 28 km N of Spencer, Idaho
  10. 1.8 3 km WSW of Hebgen Lake Estates, Montana
  11. 2.1 32 km S of Virginia City, Montana
  12. 1.9 30 km WNW of Hebgen Lake Estates, Montana
  13. 2.1 47 km ENE of Lima, Montana
  14. 2.3 45 km NE of Spencer, Idaho
  15. 1.9 27 km WNW 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 4.3 on 2016-06-13 — it released about 1,900 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.