QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

22 km WNW of Clayton, Idaho

· 13 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Custer County 33 kmCamas County 90 kmBoise County 91 kmLemhi County 92 kmValley County 97 kmBlaine County 117 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
13 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Custer County, 33 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1263 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 44.3123, -114.6667. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Custer County, ID 33 km (21 mi) W of here earthquakes near Custer County
Camas County, ID 90 km (56 mi) N of here earthquakes near Camas County
Boise County, ID 91 km (57 mi) ENE of here earthquakes near Boise County
Lemhi County, ID 92 km (57 mi) SW of here earthquakes near Lemhi County
Valley County, ID 97 km (60 mi) SE of here earthquakes near Valley County
Blaine County, ID 117 km (73 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. 2.0 15 km NW of Stanley, Idaho
  2. 1.7 12 km NNE of Stanley, Idaho
  3. 2.0 12 km NE of Stanley, Idaho
  4. 1.6 12 km NE of Stanley, Idaho
  5. 2.3 12 km NE of Stanley, Idaho
  6. 1.9 12 km NE of Stanley, Idaho
  7. 1.7 13 km NE of Stanley, Idaho
  8. 2.3 12 km NE of Stanley, Idaho
  9. 2.4 13 km NNE of Stanley, Idaho
  10. 1.6 28 km WNW of Challis, Idaho
  11. 1.9 11 km NE of Stanley, Idaho
  12. 1.5 36 km W of Challis, Idaho
  13. 1.7 11 km NE of Stanley, Idaho
  14. 2.4 20 km WNW of Stanley, Idaho
  15. 2.3 11 km ENE 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.

For this area

The largest earthquake within 50 km in our catalogue was M 6.5 on 2020-03-31 — it released about 350,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.