QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8mwr

9 km NNW of Livingston, Montana

· 20 km deep · released about 7.6 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Park County 32 kmGallatin County 51 kmSweet Grass County 51 kmStillwater County 95 kmBroadwater County 95 kmMeagher County 97 kmWheatland County 101 kmMadison County 113 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 3.8 (mwr)
Depth
20 km below the surface
Felt
309 reports · strongest reported intensity III
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Park County, 32 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1062 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 309 people have reported feeling it to USGS.

How big was it?

This earthquake released about 7.6 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 22,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 710× the energy of this one
  4. This earthquake M 3.8 about 7.6 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 16× 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 45.7449, -110.5969. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Park County, MT 32 km (20 mi) N of here earthquakes near Park County
Gallatin County, MT 51 km (32 mi) ENE of here earthquakes near Gallatin County
Sweet Grass County, MT 51 km (32 mi) W of here earthquakes near Sweet Grass County
Stillwater County, MT 95 km (59 mi) W of here earthquakes near Stillwater County
Broadwater County, MT 95 km (59 mi) SE of here earthquakes near Broadwater County
Meagher County, MT 97 km (60 mi) SSE of here earthquakes near Meagher County

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

Aftershocks so far

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

  1. 1.8 23 km ENE of Wilsall, Montana
  2. 1.7 13 km S of Bozeman, Montana
  3. 1.5 14 km NNW of Emigrant, Montana
  4. 2.0 5 km NNE of Springhill, Montana
  5. 1.6 7 km NNW of Emigrant, Montana
  6. 2.3 15 km E of Livingston, Montana
  7. 2.4 20 km NNW of Springhill, 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.