QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

25 km S of Stanley, Idaho

· 7.0 km deep · released about 41 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Camas County 57 kmBoise County 60 kmCuster County 65 kmElmore County 78 kmBlaine County 105 kmValley County 109 kmGooding County 114 kmGem County 115 kmAda 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 2.1 (ml)
Depth
7.0 km below the surface
Felt
no reports yet
Nearest
Camas County, 57 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2188 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 41 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 43.9910, -114.9665. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Camas County, ID 57 km (35 mi) NNW of here earthquakes near Camas County
Boise County, ID 60 km (37 mi) E of here earthquakes near Boise County
Custer County, ID 65 km (40 mi) WSW of here earthquakes near Custer County
Elmore County, ID 78 km (48 mi) NNE of here earthquakes near Elmore County
Blaine County, ID 105 km (65 mi) NW of here earthquakes near Blaine County
Valley County, ID 109 km (68 mi) SSE of here earthquakes near Valley County

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

Aftershocks so far

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

  1. 1.9 24 km WNW of Stanley, Idaho
  2. 2.6 16 km SW of Stanley, Idaho
  3. 2.7 15 km SW of Stanley, Idaho
  4. 2.0 8 km NW of Stanley, Idaho
  5. 2.1 18 km WNW of Stanley, Idaho
  6. 1.8 18 km WNW of Stanley, Idaho
  7. 2.0 19 km WNW of Stanley, Idaho
  8. 1.9 20 km WNW of Stanley, Idaho
  9. 2.3 22 km WNW of Stanley, Idaho
  10. 2.0 23 km NW of Stanley, Idaho
  11. 1.9 19 km WNW of Stanley, Idaho
  12. 2.2 20 km WNW of Stanley, Idaho
  13. 2.4 27 km NW of Stanley, Idaho
  14. 2.4 southern Idaho
  15. 2.1 26 km NW 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 4.8 on 2020-04-01 — it released about 12,000 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.