QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

11 km W of Clayton, Idaho

· 4.5 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Custer County 24 kmCamas County 86 kmLemhi County 91 kmBoise County 98 kmBlaine County 107 kmValley County 108 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
4.5 km below the surface
Felt
5 reports · strongest reported intensity IV
Nearest
Custer County, 24 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2781 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 5.4 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 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 44.2577, -114.5477. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Custer County, ID 24 km (15 mi) W of here earthquakes near Custer County
Camas County, ID 86 km (53 mi) NNE of here earthquakes near Camas County
Lemhi County, ID 91 km (57 mi) SW of here earthquakes near Lemhi County
Boise County, ID 98 km (61 mi) ENE of here earthquakes near Boise County
Blaine County, ID 107 km (67 mi) NNW of here earthquakes near Blaine County
Valley County, ID 108 km (67 mi) SE of here earthquakes near Valley 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. 1.6 20 km N of Stanley, Idaho
  2. 2.2 19 km N of Stanley, Idaho
  3. 1.9 20 km N of Stanley, Idaho
  4. 1.8 21 km N of Stanley, Idaho
  5. 1.9 20 km N of Stanley, Idaho
  6. 2.4 20 km N of Stanley, Idaho
  7. 2.4 21 km N of Stanley, Idaho
  8. 2.3 12 km NNW of Challis, Idaho
  9. 2.5 13 km NW of Challis, Idaho
  10. 1.8 5 km NNW of Challis, Idaho
  11. 1.6 9 km NNW of Challis, Idaho
  12. 2.5 14 km NNW of Challis, Idaho
  13. 1.9 9 km NNW of Challis, Idaho
  14. 2.3 12 km SE of Challis, Idaho
  15. 2.4 25 km SSW of Clayton, 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.