QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

11 km ESE of Lincoln, Montana

· 16 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis and Clark County 25 kmPowell County 31 kmGranite County 90 kmJefferson County 96 kmCascade County 100 kmTeton County 101 kmDeer Lodge County 103 kmMissoula County 103 kmBroadwater County 104 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 3.1 (ml)
Depth
16 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Lewis and Clark County, 25 km NNE
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. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 46.9242, -112.5424. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis and Clark County, MT 25 km (16 mi) SSW of here earthquakes near Lewis and Clark County
Powell County, MT 31 km (19 mi) ENE of here earthquakes near Powell County
Granite County, MT 90 km (56 mi) NE of here earthquakes near Granite County
Jefferson County, MT 96 km (60 mi) NNW of here earthquakes near Jefferson County
Cascade County, MT 100 km (62 mi) WSW of here earthquakes near Cascade County
Teton County, MT 101 km (63 mi) SSW of here earthquakes near Teton 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. 1.5 8 km SSE of Lincoln, Montana
  2. 3.2 9 km SW of Elliston, Montana
  3. 1.6 14 km SE of Lincoln, Montana
  4. 1.5 10 km ENE of Marysville, Montana
  5. 2.4 14 km ESE of Lincoln, Montana
  6. 2.3 14 km ESE of Lincoln, Montana
  7. 1.9 15 km SE of Lincoln, Montana
  8. 1.8 14 km SE of Lincoln, Montana
  9. 1.7 15 km SE of Lincoln, Montana
  10. 1.6 15 km SE of Lincoln, Montana
  11. 1.6 14 km ESE of Lincoln, Montana
  12. 1.6 12 km ESE of Lincoln, Montana
  13. 2.6 14 km ESE of Lincoln, Montana
  14. 3.0 18 km ESE of Lincoln, Montana
  15. 2.6 18 km NW of Marysville, 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 11,000 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.