QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7mwr

4 km N of Manhattan, Montana

· 6.0 km deep · released about 5.4 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Gallatin County 45 kmBroadwater County 49 kmJefferson County 61 kmMadison County 78 kmPark County 79 kmMeagher County 83 kmSilver Bow County 102 kmSweet Grass County 109 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 3.7 (mwr)
Depth
6.0 km below the surface
Felt
570 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Gallatin County, 45 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2174 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 570 people have reported feeling it to USGS.

How big was it?

This earthquake released about 5.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 32,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,000× the energy of this one
  4. This earthquake M 3.7 about 5.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 11× 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 45.9007, -111.3412. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Gallatin County, MT 45 km (28 mi) NNW of here earthquakes near Gallatin County
Broadwater County, MT 49 km (31 mi) SSE of here earthquakes near Broadwater County
Jefferson County, MT 61 km (38 mi) ESE of here earthquakes near Jefferson County
Madison County, MT 78 km (48 mi) NE of here earthquakes near Madison County
Park County, MT 79 km (49 mi) NW of here earthquakes near Park County
Meagher County, MT 83 km (51 mi) SSW of here earthquakes near Meagher County

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

Aftershocks so far

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

  1. 1.7 1 km W of Manhattan, Montana
  2. 1.6 2 km WNW of Manhattan, Montana
  3. 2.3 2 km WNW of Manhattan, Montana
  4. 1.7 2 km WNW of Manhattan, Montana
  5. 2.4 1 km WNW of Manhattan, Montana
  6. 1.6 3 km WNW of Manhattan, Montana
  7. 2.7 2 km WNW of Manhattan, Montana
  8. 1.6 2 km WNW of Manhattan, Montana
  9. 2.4 2 km WSW of Manhattan, Montana
  10. 1.5 2 km WNW of Manhattan, Montana
  11. 2.4 1 km NNW of Manhattan, Montana
  12. 2.2 1 km NW of Manhattan, Montana
  13. 1.6 Western Montana
  14. 1.6 2 km WNW of Manhattan, Montana
  15. 2.0 3 km WNW of Manhattan, 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.