QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

5 km N of Smiths Ferry, Idaho

· 10 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Gem County 41 kmBoise County 50 kmWashington County 58 kmPayette County 66 kmAdams County 66 kmValley County 67 kmCanyon County 95 kmAda County 101 kmElmore County 117 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
10 km below the surface
Felt
no reports yet
Nearest
Gem County, 41 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1400 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× 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 43 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 44.3486, -116.0793. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Gem County, ID 41 km (25 mi) NE of here earthquakes near Gem County
Boise County, ID 50 km (31 mi) NW of here earthquakes near Boise County
Washington County, ID 58 km (36 mi) E of here earthquakes near Washington County
Payette County, ID 66 km (41 mi) NE of here earthquakes near Payette County
Adams County, ID 66 km (41 mi) SSE of here earthquakes near Adams County
Valley County, ID 67 km (42 mi) SSW of here earthquakes near Valley 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. 2.2 9 km N of Smiths Ferry, Idaho
  2. 1.6 7 km NNW of Smiths Ferry, Idaho
  3. 2.7 11 km NW of Smiths Ferry, Idaho
  4. 2.4 7 km NW of Smiths Ferry, Idaho
  5. 2.4 7 km NNW of Smiths Ferry, Idaho
  6. 3.0 6 km NNW of Smiths Ferry, Idaho
  7. 2.1 8 km NNW of Smiths Ferry, Idaho
  8. 2.3 10 km SW of Cascade, Idaho
  9. 1.7 8 km NNW of Smiths Ferry, Idaho
  10. 2.2 8 km NNW of Smiths Ferry, Idaho
  11. 1.9 8 km NNW of Smiths Ferry, Idaho
  12. 1.6 9 km NNW of Smiths Ferry, Idaho
  13. 2.4 7 km NNW of Smiths Ferry, Idaho
  14. 2.1 7 km NNW of Smiths Ferry, Idaho
  15. 2.2 8 km NNW of Smiths Ferry, 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.

On USGS

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