QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

37 km NE of Seeley Lake, Montana

· 14 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis and Clark County 62 kmPowell County 63 kmMissoula County 73 kmTeton County 77 kmLake County 79 kmPondera County 113 kmGranite County 114 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 1.5 (ml)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Lewis and Clark County, 62 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1937 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 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 47.3968, -113.0973. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis and Clark County, MT 62 km (39 mi) WNW of here earthquakes near Lewis and Clark County
Powell County, MT 63 km (39 mi) NNW of here earthquakes near Powell County
Missoula County, MT 73 km (45 mi) NE of here earthquakes near Missoula County
Teton County, MT 77 km (48 mi) SW of here earthquakes near Teton County
Lake County, MT 79 km (49 mi) ESE of here earthquakes near Lake County
Pondera County, MT 113 km (70 mi) SW of here earthquakes near Pondera County

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

Aftershocks so far

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

  1. 2.3 34 km NE of Seeley Lake, Montana
  2. 1.8 20 km N of Ovando, Montana
  3. 2.2 43 km NNE of Ovando, Montana
  4. 2.5 42 km NNE of Ovando, Montana
  5. 1.8 17 km E of Condon, Montana
  6. 2.4 16 km ENE of Seeley Lake, Montana
  7. 3.0 26 km WSW of Augusta, Montana
  8. 2.7 6 km SSE of Seeley Lake, Montana
  9. 1.9 6 km SSE of Seeley Lake, Montana
  10. 1.6 15 km WNW of Lincoln, Montana
  11. 1.8 21 km E of Seeley Lake, Montana
  12. 1.6 24 km W of Augusta, Montana
  13. 2.2 33 km NE of Seeley Lake, Montana
  14. 3.5 32 km NE of Seeley Lake, Montana
  15. 1.7 25 km ENE of Seeley Lake, 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.