QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

13 km WNW of Lincoln, Montana

· 9.5 km deep · released about 85 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Powell County 19 kmLewis and Clark County 37 kmMissoula County 80 kmGranite County 81 kmTeton County 100 kmDeer Lodge County 104 kmJefferson County 115 kmLake County 118 kmCascade County 118 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 2.3 (ml)
Depth
9.5 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Powell County, 19 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2271 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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 47.0054, -112.8401. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Powell County, MT 19 km (12 mi) NNE of here earthquakes near Powell County
Lewis and Clark County, MT 37 km (23 mi) WSW of here earthquakes near Lewis and Clark County
Missoula County, MT 80 km (50 mi) E of here earthquakes near Missoula County
Granite County, MT 81 km (50 mi) NNE of here earthquakes near Granite County
Teton County, MT 100 km (62 mi) SSW of here earthquakes near Teton County
Deer Lodge County, MT 104 km (65 mi) NNE of here earthquakes near Deer Lodge County

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

Aftershocks so far

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

  1. 2.0 36 km NE of Seeley Lake, Montana
  2. 1.7 37 km NE of Seeley Lake, Montana
  3. 1.6 36 km NE of Seeley Lake, Montana
  4. 1.8 13 km ESE of Lincoln, Montana
  5. 2.8 36 km NE of Seeley Lake, Montana
  6. 2.0 37 km NE of Seeley Lake, Montana
  7. 2.2 36 km NE of Seeley Lake, Montana
  8. 1.8 36 km NE of Seeley Lake, Montana
  9. 2.2 36 km NE of Seeley Lake, Montana
  10. 1.5 36 km NE of Seeley Lake, Montana
  11. 1.9 36 km NE of Seeley Lake, Montana
  12. 2.2 36 km NE of Seeley Lake, Montana
  13. 2.3 14 km ESE of Lincoln, Montana
  14. 1.9 14 km SE of Lincoln, Montana
  15. 1.7 Western 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 180,000 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.