QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6ml

9 km SE of Lincoln, Montana

· 8.3 km deep · released about 3.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Powell County 28 kmLewis and Clark County 28 kmGranite County 86 kmJefferson County 96 kmDeer Lodge County 100 kmMissoula County 101 kmCascade County 104 kmTeton County 104 kmBroadwater County 105 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 3.6 (ml)
Depth
8.3 km below the surface
Felt
5 reports · strongest reported intensity II
Measured shaking
intensity III (ShakeMap)
Nearest
Powell County, 28 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1561 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 45,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,400× the energy of this one
  4. This earthquake M 3.6 about 3.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 7.9× 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 46.9055, -112.5795. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Powell County, MT 28 km (17 mi) ENE of here earthquakes near Powell County
Lewis and Clark County, MT 28 km (18 mi) SSW of here earthquakes near Lewis and Clark County
Granite County, MT 86 km (53 mi) NE of here earthquakes near Granite County
Jefferson County, MT 96 km (59 mi) NNW of here earthquakes near Jefferson County
Deer Lodge County, MT 100 km (62 mi) NNE of here earthquakes near Deer Lodge County
Missoula County, MT 101 km (62 mi) E of here earthquakes near Missoula 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. 2.8 14 km SSE of Lincoln, Montana
  2. 1.9 15 km SE of Lincoln, Montana
  3. 2.4 14 km ESE of Lincoln, Montana
  4. 3.0 8 km ESE of Lincoln, Montana
  5. 1.9 13 km ESE of Lincoln, Montana
  6. 2.3 3 km SW of Lincoln, Montana
  7. 1.9 14 km SE of Lincoln, Montana
  8. 2.3 3 km W of Lincoln, Montana
  9. 2.4 15 km SE of Lincoln, Montana
  10. 3.0 12 km SSE of Lincoln, Montana
  11. 2.6 Western Montana
  12. 1.9 12 km ESE of Lincoln, Montana
  13. 2.3 15 km SSE of Lincoln, Montana
  14. 1.5 13 km SE of Lincoln, Montana
  15. 2.5 12 km SE of Lincoln, 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 5.8 on 2017-07-06 — it released about 2,000 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.