QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4ml

12 km WNW of Wisdom, Montana

· 24 km deep · released about 1.9 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Deer Lodge County 62 kmRavalli County 62 kmSilver Bow County 78 kmBeaverhead County 79 kmLemhi County 82 kmGranite County 85 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 3.4 (ml)
Depth
24 km below the surface
Felt
3 reports · strongest reported intensity IV
Nearest
Deer Lodge County, 62 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 282 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.9 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 89,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,800× the energy of this one
  4. This earthquake M 3.4 about 1.9 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4× 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 45.6417, -113.6037. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Deer Lodge County, MT 62 km (38 mi) SW of here earthquakes near Deer Lodge County
Ravalli County, MT 62 km (39 mi) SE of here earthquakes near Ravalli County
Silver Bow County, MT 78 km (49 mi) WSW of here earthquakes near Silver Bow County
Beaverhead County, MT 79 km (49 mi) NW of here earthquakes near Beaverhead County
Lemhi County, ID 82 km (51 mi) NNE of here earthquakes near Lemhi County
Granite County, MT 85 km (53 mi) S of here earthquakes near Granite County

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

Aftershocks so far

6 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

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.