QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

20 km W of Clayton, Idaho

· 10 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Custer County 32 kmCamas County 88 kmBoise County 92 kmLemhi County 93 kmValley County 99 kmBlaine County 114 kmElmore County 119 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 2.5 (ml)
Depth
10 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Custer County, 32 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3077 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 44.2894, -114.6485. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Custer County, ID 32 km (20 mi) W of here earthquakes near Custer County
Camas County, ID 88 km (55 mi) N of here earthquakes near Camas County
Boise County, ID 92 km (57 mi) ENE of here earthquakes near Boise County
Lemhi County, ID 93 km (58 mi) SW of here earthquakes near Lemhi County
Valley County, ID 99 km (62 mi) SE of here earthquakes near Valley County
Blaine County, ID 114 km (71 mi) NNW of here earthquakes near Blaine 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. 1.9 15 km W of Clayton, Idaho
  2. 1.6 13 km W of Clayton, Idaho
  3. 2.4 13 km WNW of Clayton, Idaho
  4. 2.7 23 km WSW of Challis, Idaho
  5. 2.0 31 km W of Challis, Idaho
  6. 1.9 23 km NW of Clayton, Idaho
  7. 2.1 southern Idaho
  8. 2.7 22 km NNW of Clayton, Idaho
  9. 1.9 16 km NNW of Stanley, Idaho
  10. 2.3 16 km NNW of Stanley, Idaho
  11. 2.1 16 km NNW of Stanley, Idaho
  12. 2.0 11 km WNW of Clayton, Idaho
  13. 1.7 28 km S of Clayton, Idaho
  14. 2.2 22 km SSW of Clayton, Idaho
  15. 2.0 13 km W 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.