QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

20 km ENE of Clayton, Idaho

· 13 km deep · released about 340 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Custer County 9 kmLemhi County 71 kmCamas County 103 kmBlaine County 104 kmButte County 106 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 2.7 (ml)
Depth
13 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Custer County, 9 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1446 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 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 44.3176, -114.1625. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Custer County, ID 9 km (5 mi) NE of here earthquakes near Custer County
Lemhi County, ID 71 km (44 mi) SSW of here earthquakes near Lemhi County
Camas County, ID 103 km (64 mi) NNE of here earthquakes near Camas County
Blaine County, ID 104 km (65 mi) N of here earthquakes near Blaine County
Butte County, ID 106 km (66 mi) NW of here earthquakes near Butte County
Valley County, ID 130 km (81 mi) ESE of here earthquakes near Valley County

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

Aftershocks so far

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

  1. 2.2 20 km NNW of Challis, Idaho
  2. 2.0 13 km NNE of Challis, Idaho
  3. 2.2 21 km NNW of Challis, Idaho
  4. 1.6 23 km NNW of Challis, Idaho
  5. 2.1 28 km WNW of Challis, Idaho
  6. 2.3 29 km WNW of Challis, Idaho
  7. 1.6 18 km NW of Challis, Idaho
  8. 1.9 34 km NW of Mackay, Idaho
  9. 2.2 24 km NW of Challis, Idaho
  10. 1.6 28 km WNW of Challis, Idaho
  11. 1.5 36 km W of Challis, Idaho
  12. 2.3 21 km NNW of Challis, Idaho
  13. 1.7 21 km NNW of Challis, Idaho
  14. 2.1 southern Idaho
  15. 3.4 24 km NNW 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.