QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

12 km SW of Clayton, Idaho

· 10 km deep · released about 6.2 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Custer County 23 kmCamas County 77 kmBlaine County 97 kmLemhi County 97 kmBoise County 99 kmElmore County 116 kmValley County 117 kmButte County 119 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
10 km below the surface
Felt
no reports yet
Nearest
Custer County, 23 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1942 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 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 44.1700, -114.5037. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Custer County, ID 23 km (14 mi) WSW of here earthquakes near Custer County
Camas County, ID 77 km (48 mi) NNE of here earthquakes near Camas County
Blaine County, ID 97 km (60 mi) NNW of here earthquakes near Blaine County
Lemhi County, ID 97 km (61 mi) SSW of here earthquakes near Lemhi County
Boise County, ID 99 km (61 mi) ENE of here earthquakes near Boise County
Elmore County, ID 116 km (72 mi) NE of here earthquakes near Elmore County

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

Aftershocks so far

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

  1. 2.4 8 km N of Stanley, Idaho
  2. 1.9 6 km NNE of Stanley, Idaho
  3. 2.4 8 km NNW of Stanley, Idaho
  4. 2.0 southern Idaho
  5. 1.8 6 km NNE of Stanley, Idaho
  6. 1.8 6 km N of Stanley, Idaho
  7. 1.8 6 km NNE of Stanley, Idaho
  8. 2.0 12 km NW of Stanley, Idaho
  9. 1.9 10 km NW of Stanley, Idaho
  10. 2.0 12 km NE of Stanley, Idaho
  11. 2.2 19 km WSW of Challis, Idaho
  12. 1.8 11 km NNE of Stanley, Idaho
  13. 2.1 16 km SSW of Clayton, Idaho
  14. 1.7 10 km N of Stanley, Idaho
  15. 1.6 19 km NE of Stanley, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.2 on 2020-06-14 — it released about 9,800 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.