QuakeIndex

Earthquake · reviewed by a seismologist

M 4.9mww

10 km N of Smiths Ferry, Idaho

· 12 km deep · released about 340 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Gem County 43 kmBoise County 55 kmWashington County 55 kmAdams County 61 kmValley County 65 kmPayette County 67 kmCanyon County 98 kmAda County 105 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 4.9 (mww)
Depth
12 km below the surface
Felt
3130 reports · strongest reported intensity VII
Measured shaking
intensity VI (ShakeMap)
USGS impact alert
green
Nearest
Gem County, 43 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 228 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 3130 people have reported feeling it to USGS.

How big was it?

This earthquake released about 340 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.9 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 500× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 22× the energy of this one
  3. Magna, Utah 2020 M 5.7 16× the energy of this one
  4. This earthquake M 4.9 about 340 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 710× 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 44.3907, -116.1108. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Gem County, ID 43 km (27 mi) NNE of here earthquakes near Gem County
Boise County, ID 55 km (34 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 61 km (38 mi) SSE of here earthquakes near Adams County
Valley County, ID 65 km (40 mi) SW of here earthquakes near Valley County
Payette County, ID 67 km (42 mi) NE of here earthquakes near Payette 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. 2.6 7 km NW of Smiths Ferry, Idaho
  2. 2.5 8 km NNW of Smiths Ferry, Idaho
  3. 3.3 8 km NW of Smiths Ferry, Idaho
  4. 1.9 16 km WSW of Cascade, Idaho
  5. 2.6 8 km NNW of Smiths Ferry, Idaho
  6. 2.6 7 km NNW of Smiths Ferry, Idaho
  7. 2.2 8 km NW of Smiths Ferry, Idaho
  8. 1.8 7 km NNW of Smiths Ferry, Idaho
  9. 2.4 7 km NNW of Smiths Ferry, Idaho
  10. 3.5 8 km N of Smiths Ferry, Idaho
  11. 2.0 7 km NNW of Smiths Ferry, Idaho
  12. 2.9 8 km NNW of Smiths Ferry, Idaho
  13. 2.1 7 km N of Smiths Ferry, Idaho
  14. 2.4 6 km NNW of Smiths Ferry, Idaho
  15. 2.1 6 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.