QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

21 km NNW of Lincoln, Montana

· 10 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Powell County 32 kmLewis and Clark County 34 kmMissoula County 81 kmTeton County 88 kmGranite County 93 kmLake County 111 kmCascade County 114 kmDeer Lodge County 116 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 2.2 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Powell County, 32 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 886 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 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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 47.1198, -112.8277. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Powell County, MT 32 km (20 mi) NNE of here earthquakes near Powell County
Lewis and Clark County, MT 34 km (21 mi) W of here earthquakes near Lewis and Clark County
Missoula County, MT 81 km (51 mi) E of here earthquakes near Missoula County
Teton County, MT 88 km (55 mi) SSW of here earthquakes near Teton County
Granite County, MT 93 km (58 mi) NNE of here earthquakes near Granite County
Lake County, MT 111 km (69 mi) ESE of here earthquakes near Lake County

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

Aftershocks so far

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

  1. 1.5 26 km W of Augusta, Montana
  2. 2.3 34 km NE of Seeley Lake, Montana
  3. 1.5 15 km SE of Lincoln, Montana
  4. 1.8 20 km N of Ovando, Montana
  5. 2.4 10 km S of Ovando, Montana
  6. 1.7 7 km SSE of Lincoln, Montana
  7. 2.2 43 km NNE of Ovando, Montana
  8. 2.5 42 km NNE of Ovando, Montana
  9. 2.1 15 km E of Lincoln, Montana
  10. 1.6 13 km ESE of Lincoln, Montana
  11. 1.6 19 km E of Lincoln, Montana
  12. 2.4 16 km ENE of Seeley Lake, Montana
  13. 1.7 18 km ESE of Lincoln, Montana
  14. 3.0 26 km WSW of Augusta, Montana
  15. 1.8 17 km ENE of Drummond, 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 250,000 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.