QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

40 km NW of Stanley, Idaho

· 12 km deep · released about 52 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Valley County 48 kmBoise County 70 kmCuster County 83 kmAdams County 104 kmGem County 105 kmLemhi County 117 kmCamas 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 2.2 (ml)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Valley County, 48 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1570 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 52 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 290,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 52 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 44.5140, -115.2435. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Valley County, ID 48 km (30 mi) SE of here earthquakes near Valley County
Boise County, ID 70 km (43 mi) NNE of here earthquakes near Boise County
Custer County, ID 83 km (52 mi) WNW of here earthquakes near Custer County
Adams County, ID 104 km (65 mi) ESE of here earthquakes near Adams County
Gem County, ID 105 km (65 mi) ENE of here earthquakes near Gem County
Lemhi County, ID 117 km (72 mi) WSW of here earthquakes near Lemhi 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. 1.9 35 km NW of Stanley, Idaho
  2. 2.4 11 km NE of Stanley, Idaho
  3. 1.6 10 km NE of Stanley, Idaho
  4. 1.9 12 km NE of Stanley, Idaho
  5. 1.7 10 km NE of Stanley, Idaho
  6. 1.8 12 km NE of Stanley, Idaho
  7. 2.0 11 km NE of Stanley, Idaho
  8. 1.6 19 km WNW of Stanley, Idaho
  9. 2.0 11 km NE of Stanley, Idaho
  10. 2.3 6 km NNE of Stanley, Idaho
  11. 2.2 21 km WNW of Stanley, Idaho
  12. 2.3 11 km NE of Stanley, Idaho
  13. 1.8 11 km NE of Stanley, Idaho
  14. 2.5 8 km NE of Stanley, Idaho
  15. 1.9 11 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 6.5 on 2020-03-31 — it released about 3,200,000 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.