QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

11 km WNW of Mackay, Idaho

· 10 km deep · released about 340 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Custer County 54 kmButte County 55 kmBlaine County 65 kmCamas County 97 kmLemhi County 109 kmLincoln County 112 kmJefferson County 116 kmClark 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 2.7 (ml)
Depth
10 km below the surface
Felt
5 reports · strongest reported intensity III
Nearest
Custer County, 54 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2140 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have 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 43.9558, -113.7447. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Custer County, ID 54 km (33 mi) SE of here earthquakes near Custer County
Butte County, ID 55 km (34 mi) WNW of here earthquakes near Butte County
Blaine County, ID 65 km (40 mi) NNE of here earthquakes near Blaine County
Camas County, ID 97 km (60 mi) ENE of here earthquakes near Camas County
Lemhi County, ID 109 km (68 mi) S of here earthquakes near Lemhi County
Lincoln County, ID 112 km (70 mi) NNE of here earthquakes near Lincoln County

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

Aftershocks so far

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

  1. 2.2 27 km ENE of Bellevue, Idaho
  2. 2.4 26 km ENE of Bellevue, Idaho
  3. 2.3 26 km E of Clayton, Idaho
  4. 2.4 27 km E of Clayton, Idaho
  5. 1.6 20 km E of Clayton, Idaho
  6. 2.3 28 km E of Clayton, Idaho
  7. 1.8 27 km E of Clayton, Idaho
  8. 2.3 27 km E of Clayton, Idaho
  9. 2.2 26 km E of Clayton, Idaho
  10. 2.4 26 km E of Clayton, Idaho
  11. 2.4 26 km E of Clayton, Idaho
  12. 2.1 26 km E of Clayton, Idaho
  13. 2.0 26 km E of Clayton, Idaho
  14. 3.2 25 km E of Clayton, Idaho
  15. 4.3 24 km E 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.