QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

southern Idaho

· 6.0 km deep · released about 44 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Camas County 47 kmBoise County 58 kmElmore County 66 kmCuster County 74 kmBlaine County 101 kmGooding County 103 kmAda County 111 kmGem County 113 kmValley 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 2.1 (ml)
Depth
6.0 km below the surface
Felt
no reports yet
Nearest
Camas County, 47 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1196 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 44 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 5.8 340,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 240,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 44 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 43.8878, -115.0038. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Camas County, ID 47 km (29 mi) NNW of here earthquakes near Camas County
Boise County, ID 58 km (36 mi) E of here earthquakes near Boise County
Elmore County, ID 66 km (41 mi) NE of here earthquakes near Elmore County
Custer County, ID 74 km (46 mi) SW of here earthquakes near Custer County
Blaine County, ID 101 km (63 mi) WNW of here earthquakes near Blaine County
Gooding County, ID 103 km (64 mi) N of here earthquakes near Gooding County

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

Aftershocks so far

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

  1. 1.6 16 km NW of Stanley, Idaho
  2. 1.8 southern Idaho
  3. 1.5 15 km SW of Stanley, Idaho
  4. 1.8 21 km WNW of Stanley, Idaho
  5. 2.2 southern Idaho
  6. 1.7 12 km WSW of Stanley, Idaho
  7. 1.9 12 km NE of Stanley, Idaho
  8. 2.1 19 km WNW of Stanley, Idaho
  9. 1.6 19 km WNW of Stanley, Idaho
  10. 1.8 19 km WNW of Stanley, Idaho
  11. 2.2 11 km NE of Stanley, Idaho
  12. 2.1 12 km NE of Stanley, Idaho
  13. 2.2 21 km WNW of Stanley, Idaho
  14. 2.4 18 km WNW of Stanley, Idaho
  15. 2.3 35 km SE of Lowman, 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 2020-08-08 — it released about 1,400 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.