QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

6 km NNW of Smiths Ferry, Idaho

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Gem County 38 kmBoise County 52 kmWashington County 54 kmPayette County 62 kmAdams County 65 kmValley County 70 kmCanyon County 93 kmAda County 100 kmElmore 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
5.4 km below the surface
Felt
7 reports · strongest reported intensity III
Nearest
Gem County, 38 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1835 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 7 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 44.3464, -116.1312. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Gem County, ID 38 km (24 mi) NE of here earthquakes near Gem County
Boise County, ID 52 km (32 mi) NW of here earthquakes near Boise County
Washington County, ID 54 km (34 mi) ESE of here earthquakes near Washington County
Payette County, ID 62 km (39 mi) NE of here earthquakes near Payette County
Adams County, ID 65 km (40 mi) SSE of here earthquakes near Adams County
Valley County, ID 70 km (43 mi) SW 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 7 km NNW of Smiths Ferry, Idaho
  2. 2.1 7 km NNW of Smiths Ferry, Idaho
  3. 2.1 8 km NNW of Smiths Ferry, Idaho
  4. 2.8 6 km NNW of Smiths Ferry, Idaho
  5. 1.6 7 km N of Smiths Ferry, Idaho
  6. 4.9 10 km N of Smiths Ferry, Idaho
  7. 1.9 12 km ENE of Donnelly, Idaho
  8. 1.9 13 km NW of Smiths Ferry, Idaho
  9. 2.3 7 km WNW of Smiths Ferry, Idaho
  10. 2.1 8 km WNW of Smiths Ferry, Idaho
  11. 2.2 10 km WNW of Smiths Ferry, Idaho
  12. 1.8 10 km WSW of Smiths Ferry, Idaho
  13. 1.9 7 km WNW of Smiths Ferry, Idaho
  14. 2.1 10 km W of Donnelly, Idaho
  15. 1.8 8 km WNW 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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