QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

35 km NW of Mackay, Idaho

· 6.8 km deep · released about 6.2 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Custer County 29 kmButte County 79 kmBlaine County 82 kmLemhi County 89 kmCamas County 97 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 1.5 (ml)
Depth
6.8 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Custer County, 29 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2600 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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 44.1323, -113.9423. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Custer County, ID 29 km (18 mi) ESE of here earthquakes near Custer County
Butte County, ID 79 km (49 mi) NW of here earthquakes near Butte County
Blaine County, ID 82 km (51 mi) N of here earthquakes near Blaine County
Lemhi County, ID 89 km (55 mi) S of here earthquakes near Lemhi County
Camas County, ID 97 km (60 mi) NE of here earthquakes near Camas County
Beaverhead County, MT 139 km (86 mi) SW of here earthquakes near Beaverhead County

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

Aftershocks so far

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

  1. 2.4 26 km ESE of Challis, Idaho
  2. 2.3 23 km E of Challis, Idaho
  3. 1.9 22 km NNE of Sun Valley, Idaho
  4. 2.2 33 km NW of Mackay, Idaho
  5. 1.7 24 km ESE of Clayton, Idaho
  6. 2.3 16 km SSE of Clayton, Idaho
  7. 2.7 13 km SSE of Clayton, Idaho
  8. 1.7 21 km E of Clayton, Idaho
  9. 1.6 23 km E of Clayton, Idaho
  10. 1.8 9 km SE of Challis, Idaho
  11. 1.8 30 km ESE of Clayton, Idaho
  12. 2.2 3 km ENE of Clayton, Idaho
  13. 2.1 23 km WNW of Mackay, Idaho
  14. 1.6 10 km SE of Challis, Idaho
  15. 2.3 28 km S 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.