QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

13 km SSE of Clayton, Idaho

· 10 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Custer County 15 kmCamas County 80 kmBlaine County 90 kmLemhi County 94 kmButte County 106 kmBoise County 112 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 2.8 (ml)
Depth
10 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Custer County, 15 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2483 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 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 44.1508, -114.3372. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Custer County, ID 15 km (9 mi) SSW of here earthquakes near Custer County
Camas County, ID 80 km (50 mi) NNE of here earthquakes near Camas County
Blaine County, ID 90 km (56 mi) NNW of here earthquakes near Blaine County
Lemhi County, ID 94 km (58 mi) SSW of here earthquakes near Lemhi County
Butte County, ID 106 km (66 mi) WNW of here earthquakes near Butte County
Boise County, ID 112 km (69 mi) E of here earthquakes near Boise 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. 1.8 11 km NE of Stanley, Idaho
  2. 2.6 7 km E of Challis, Idaho
  3. 1.8 5 km WNW of Clayton, Idaho
  4. 2.8 6 km E of Stanley, Idaho
  5. 2.4 7 km ENE of Stanley, Idaho
  6. 1.9 13 km NE of Stanley, Idaho
  7. 1.8 16 km SE of Challis, Idaho
  8. 2.0 16 km SE of Challis, Idaho
  9. 1.8 15 km NNE of Stanley, Idaho
  10. 2.9 12 km NNE of Stanley, Idaho
  11. 2.5 12 km NNE of Stanley, Idaho
  12. 2.4 12 km NNE of Stanley, Idaho
  13. 2.0 12 km NNE of Stanley, Idaho
  14. 2.6 12 km NNE of Stanley, Idaho
  15. 2.7 14 km NNE of Stanley, 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.