QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5ml

8 km N of Smiths Ferry, Idaho

· 10 km deep · released about 2.7 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Gem County 42 kmBoise County 53 kmWashington County 55 kmAdams County 63 kmPayette County 66 kmValley County 66 kmCanyon County 96 kmAda County 103 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 3.5 (ml)
Depth
10 km below the surface
Felt
10 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Gem County, 42 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 869 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 10 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 63,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,000× the energy of this one
  4. This earthquake M 3.5 about 2.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.6× 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 44.3742, -116.1077. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Gem County, ID 42 km (26 mi) NNE of here earthquakes near Gem County
Boise County, ID 53 km (33 mi) NW of here earthquakes near Boise County
Washington County, ID 55 km (34 mi) E of here earthquakes near Washington County
Adams County, ID 63 km (39 mi) SSE of here earthquakes near Adams County
Payette County, ID 66 km (41 mi) NE of here earthquakes near Payette County
Valley County, ID 66 km (41 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

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

  1. 3.1 7 km NNW of Smiths Ferry, Idaho
  2. 1.6 8 km NNE of Smiths Ferry, Idaho
  3. 2.1 7 km NNW of Smiths Ferry, Idaho
  4. 2.2 7 km N of Smiths Ferry, Idaho
  5. 2.1 7 km N of Smiths Ferry, Idaho
  6. 2.0 7 km NNW of Smiths Ferry, Idaho
  7. 2.6 7 km NNW of Smiths Ferry, Idaho
  8. 2.0 7 km NNW of Smiths Ferry, Idaho
  9. 2.0 7 km NNW of Smiths Ferry, Idaho
  10. 2.0 6 km NNW of Smiths Ferry, Idaho
  11. 1.9 8 km NNW of Smiths Ferry, Idaho
  12. 2.3 6 km NW of Smiths Ferry, Idaho
  13. 1.8 8 km NNW of Smiths Ferry, Idaho
  14. 1.5 8 km N of Smiths Ferry, Idaho
  15. 1.5 7 km N 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.9 on 2024-02-26 — it released about 130 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.