QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

20 km W of Hebgen Lake Estates, Montana

· 10 km deep · released about 7.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fremont County 63 kmMadison County 70 kmGallatin County 85 kmClark County 90 kmPark County 104 kmMadison County 112 kmTeton County 115 kmTeton County 116 kmBeaverhead County 120 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 1.6 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Fremont County, 63 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1437 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 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 44.7851, -111.4541. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fremont County, ID 63 km (39 mi) N of here earthquakes near Fremont County
Madison County, MT 70 km (44 mi) SSE of here earthquakes near Madison County
Gallatin County, MT 85 km (53 mi) SSW of here earthquakes near Gallatin County
Clark County, ID 90 km (56 mi) NE of here earthquakes near Clark County
Park County, MT 104 km (65 mi) SW of here earthquakes near Park County
Madison County, ID 112 km (70 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

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

  1. 2.3 17 km ENE of Hebgen Lake Estates, Montana
  2. 1.8 18 km ENE of Hebgen Lake Estates, Montana
  3. 1.7 6 km ESE of West Yellowstone, Montana
  4. 1.6 6 km SE of West Yellowstone, Montana
  5. 1.9 5 km ESE of West Yellowstone, Montana
  6. 1.5 6 km E of Hebgen Lake Estates, Montana
  7. 1.8 6 km E of Hebgen Lake Estates, Montana
  8. 2.4 5 km ESE of West Yellowstone, Montana
  9. 2.2 5 km ESE of West Yellowstone, Montana
  10. 1.8 4 km SE of West Yellowstone, Montana
  11. 2.0 4 km ESE of West Yellowstone, Montana
  12. 2.5 4 km ESE of West Yellowstone, Montana
  13. 2.2 Idaho-Montana border region
  14. 2.2 Idaho-Montana border region
  15. 2.0 4 km ESE 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 14,000 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.