QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

26 km WSW of Leadore, Idaho

· 13 km deep · released about 950 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lemhi County 37 kmCuster County 60 kmBeaverhead County 84 kmClark County 112 kmButte County 113 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 3.0 (ml)
Depth
13 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Lemhi County, 37 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1238 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 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 44.6298, -113.6854. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lemhi County, ID 37 km (23 mi) SSE of here earthquakes near Lemhi County
Custer County, ID 60 km (37 mi) NE of here earthquakes near Custer County
Beaverhead County, MT 84 km (52 mi) SW of here earthquakes near Beaverhead County
Clark County, ID 112 km (70 mi) WNW of here earthquakes near Clark County
Butte County, ID 113 km (70 mi) NNW of here earthquakes near Butte County
Jefferson County, ID 143 km (89 mi) NW of here earthquakes near Jefferson County

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

Aftershocks so far

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

  1. 1.7 25 km SSE of Challis, Idaho
  2. 2.3 7 km E of Challis, Idaho
  3. 3.2 18 km N of Leadore, Idaho
  4. 1.7 14 km NNE of Challis, Idaho
  5. 2.3 19 km NNE of Challis, Idaho
  6. 1.7 12 km NNE of Challis, Idaho
  7. 2.0 11 km NE of Challis, Idaho
  8. 3.2 25 km E of Clayton, Idaho
  9. 1.7 15 km SE of Challis, Idaho
  10. 1.8 22 km N of Challis, Idaho
  11. 1.6 21 km NNE of Challis, Idaho
  12. 1.6 20 km NNE of Challis, Idaho
  13. 1.8 37 km NE of Challis, Idaho
  14. 1.6 41 km NNW of Mackay, Idaho
  15. 1.7 15 km SSE of Challis, Idaho

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.