QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

37 km SW of Salmon, Idaho

· 16 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lemhi County 32 kmCuster County 79 kmValley County 106 kmBeaverhead County 111 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
16 km below the surface
Felt
no reports yet
Nearest
Lemhi County, 32 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2655 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 5.4 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 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 44.9857, -114.2907. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lemhi County, ID 32 km (20 mi) WNW of here earthquakes near Lemhi County
Custer County, ID 79 km (49 mi) N of here earthquakes near Custer County
Valley County, ID 106 km (66 mi) E of here earthquakes near Valley County
Beaverhead County, MT 111 km (69 mi) W of here earthquakes near Beaverhead County
Idaho County, ID 133 km (83 mi) SE of here earthquakes near Idaho County
Boise County, ID 158 km (98 mi) NE of here earthquakes near Boise County

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

Aftershocks so far

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

  1. 1.9 18 km S of Salmon, Idaho
  2. 1.8 18 km NNE of Challis, Idaho
  3. 1.8 45 km WSW of Salmon, Idaho
  4. 2.6 46 km WSW of Salmon, Idaho
  5. 1.6 14 km ENE of Challis, Idaho
  6. 1.6 27 km NW of Challis, Idaho
  7. 1.5 48 km WSW of Salmon, Idaho
  8. 2.4 15 km NE of Challis, Idaho
  9. 2.0 12 km NNE of Salmon, Idaho
  10. 2.3 22 km NNE of Challis, Idaho
  11. 1.8 22 km NNE of Challis, Idaho
  12. 2.4 12 km NW of Challis, Idaho
  13. 1.9 23 km NNE of Challis, Idaho
  14. 1.6 55 km E of Yellow Pine, Idaho
  15. 1.8 8 km N 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

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