QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

22 km NNW of Wisdom, Montana

· 9.0 km deep · released about 9.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Deer Lodge County 43 kmRavalli County 54 kmGranite County 65 kmSilver Bow County 68 kmBeaverhead County 90 kmLemhi County 102 kmJefferson 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 1.7 (ml)
Depth
9.0 km below the surface
Felt
no reports yet
Nearest
Deer Lodge County, 43 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 487 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 9.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 99× the energy of this one
  4. This earthquake M 1.7 about 9.6 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 45.8115, -113.5278. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Deer Lodge County, MT 43 km (27 mi) SW of here earthquakes near Deer Lodge County
Ravalli County, MT 54 km (33 mi) ESE of here earthquakes near Ravalli County
Granite County, MT 65 km (41 mi) S of here earthquakes near Granite County
Silver Bow County, MT 68 km (42 mi) W of here earthquakes near Silver Bow County
Beaverhead County, MT 90 km (56 mi) NNW of here earthquakes near Beaverhead County
Lemhi County, ID 102 km (63 mi) NNE of here earthquakes near Lemhi County

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

Aftershocks so far

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

  1. 2.7 10 km WNW of Wisdom, Montana
  2. 1.6 32 km SSW of Anaconda, Montana
  3. 2.4 7 km W of Wisdom, Montana
  4. 1.9 6 km NW of Wisdom, Montana
  5. 1.6 4 km WSW of Wisdom, Montana
  6. 1.9 8 km WNW of Wisdom, Montana
  7. 3.4 12 km WNW of Wisdom, Montana
  8. 2.0 10 km WNW of Wisdom, Montana
  9. 1.8 21 km NNW of Wisdom, Montana
  10. 1.9 21 km NNW of Wisdom, Montana
  11. 1.7 22 km NNW of Wisdom, 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.