QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0ml

16 km NNE of Challis, Idaho

· 5.8 km deep · released about 32 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lemhi County 38 kmCuster County 41 kmBeaverhead County 113 kmValley County 120 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 2.0 (ml)
Depth
5.8 km below the surface
Felt
no reports yet
Nearest
Lemhi County, 38 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2194 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 32 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 470,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 330,000× the energy of this one
  3. Around the size people start to feel M 3.0 30× the energy of this one
  4. This earthquake M 2.0 about 32 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 44.6315, -114.1363. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lemhi County, ID 38 km (24 mi) SSW of here earthquakes near Lemhi County
Custer County, ID 41 km (25 mi) NNE of here earthquakes near Custer County
Beaverhead County, MT 113 km (70 mi) WSW of here earthquakes near Beaverhead County
Valley County, ID 120 km (74 mi) ESE of here earthquakes near Valley County
Butte County, ID 130 km (81 mi) NW of here earthquakes near Butte County

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

Aftershocks so far

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

  1. 2.3 27 km NW of Clayton, Idaho
  2. 2.2 27 km NW of Clayton, Idaho
  3. 1.8 45 km WSW of Salmon, Idaho
  4. 1.6 14 km ENE of Challis, Idaho
  5. 2.2 19 km ESE of Challis, Idaho
  6. 1.8 19 km E of Challis, Idaho
  7. 1.6 27 km NW of Challis, Idaho
  8. 1.8 11 km ESE of Challis, Idaho
  9. 2.2 19 km WSW of Challis, Idaho
  10. 2.4 26 km ESE of Challis, Idaho
  11. 1.6 19 km W of Challis, Idaho
  12. 2.2 25 km W of Challis, Idaho
  13. 2.3 23 km E of Challis, Idaho
  14. 1.7 24 km ESE of Clayton, Idaho
  15. 1.7 21 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.