QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

16 km NW of Stanley, Idaho

· 10 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Boise County 61 kmCuster County 67 kmValley County 74 kmCamas County 93 kmElmore County 106 kmGem County 108 kmLemhi County 118 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 3.1 (ml)
Depth
10 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Boise County, 61 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1744 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× more

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 44.3096, -115.0950. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Boise County, ID 61 km (38 mi) NE of here earthquakes near Boise County
Custer County, ID 67 km (42 mi) W of here earthquakes near Custer County
Valley County, ID 74 km (46 mi) SE of here earthquakes near Valley County
Camas County, ID 93 km (58 mi) NNW of here earthquakes near Camas County
Elmore County, ID 106 km (66 mi) NNE of here earthquakes near Elmore County
Gem County, ID 108 km (67 mi) ENE of here earthquakes near Gem 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. 2.0 17 km NW of Stanley, Idaho
  2. 1.9 southern Idaho
  3. 2.2 20 km WNW of Stanley, Idaho
  4. 1.9 6 km NW of Stanley, Idaho
  5. 2.2 6 km NW of Stanley, Idaho
  6. 2.5 41 km NNW of Stanley, Idaho
  7. 1.9 17 km NNE of Stanley, Idaho
  8. 2.0 21 km WNW of Stanley, Idaho
  9. 1.9 20 km NW of Stanley, Idaho
  10. 1.8 11 km NW of Stanley, Idaho
  11. 1.8 40 km NW of Stanley, Idaho
  12. 2.0 23 km NW of Stanley, Idaho
  13. 3.1 southern Idaho
  14. 1.8 40 km NNW of Stanley, Idaho
  15. 2.1 13 km W 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 6.5 on 2020-03-31 — it released about 130,000 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.