QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

43 km WNW of Hebgen Lake Estates, Montana

· 14 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madison County 54 kmFremont County 74 kmClark County 81 kmGallatin County 85 kmBeaverhead County 97 kmPark County 115 kmMadison County 119 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 2.6 (ml)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Madison County, 54 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 547 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 44.8594, -111.7234. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madison County, MT 54 km (34 mi) SSE of here earthquakes near Madison County
Fremont County, ID 74 km (46 mi) NNW of here earthquakes near Fremont County
Clark County, ID 81 km (50 mi) NE of here earthquakes near Clark County
Gallatin County, MT 85 km (53 mi) SSW of here earthquakes near Gallatin County
Beaverhead County, MT 97 km (60 mi) ESE of here earthquakes near Beaverhead County
Park County, MT 115 km (71 mi) SW of here earthquakes near Park County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.5 24 km N of Spencer, Idaho
  2. 1.7 14 km WNW of Hebgen Lake Estates, Montana
  3. 1.7 27 km W of Hebgen Lake Estates, Montana
  4. 1.6 27 km W of Hebgen Lake Estates, Montana
  5. 1.6 32 km W of Hebgen Lake Estates, Montana
  6. 1.7 26 km W of Hebgen Lake Estates, Montana
  7. 1.7 31 km NNE of Spencer, Idaho
  8. 1.8 26 km W of Hebgen Lake Estates, Montana
  9. 1.5 26 km W of Hebgen Lake Estates, Montana
  10. 2.3 26 km W of Hebgen Lake Estates, Montana
  11. 3.1 27 km W of Hebgen Lake Estates, Montana
  12. 1.5 27 km W of Hebgen Lake Estates, Montana
  13. 2.0 27 km W of Hebgen Lake Estates, Montana
  14. 2.0 37 km W of Hebgen Lake Estates, Montana
  15. 1.9 21 km S of Ennis, 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 410 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.