QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

47 km NE of Mackay, Idaho

· 2.9 km deep · released about 8.1 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Butte County 58 kmClark County 67 kmJefferson County 83 kmCuster County 85 kmLemhi County 97 kmBeaverhead County 105 kmBlaine County 110 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 1.6 (ml)
Depth
2.9 km below the surface
Felt
no reports yet
Nearest
Butte County, 58 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2271 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 8.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 8.1 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 44.2102, -113.1885. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Butte County, ID 58 km (36 mi) N of here earthquakes near Butte County
Clark County, ID 67 km (42 mi) W of here earthquakes near Clark County
Jefferson County, ID 83 km (52 mi) WNW of here earthquakes near Jefferson County
Custer County, ID 85 km (53 mi) E of here earthquakes near Custer County
Lemhi County, ID 97 km (60 mi) SE of here earthquakes near Lemhi County
Beaverhead County, MT 105 km (65 mi) SSW of here earthquakes near Beaverhead County

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

Aftershocks so far

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

  1. 1.6 26 km N of Mackay, Idaho
  2. 3.3 54 km NE of Mackay, Idaho
  3. 2.4 43 km SSE of Leadore, Idaho
  4. 1.8 35 km SSW of Lima, Montana
  5. 1.9 37 km SE of Leadore, Idaho
  6. 1.9 23 km SSE of Leadore, Idaho
  7. 2.5 28 km SSE of Leadore, Idaho
  8. 1.5 21 km SSW of Lima, Montana
  9. 2.0 30 km W of Lima, Montana
  10. 1.6 22 km WSW of Lima, Montana
  11. 2.4 21 km WSW of Lima, Montana
  12. 2.5 21 km SW of Lima, Montana
  13. 2.0 26 km SE of Leadore, Idaho
  14. 1.6 27 km SW of Lima, Montana
  15. 1.8 55 km SW of Lima, Montana

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.