QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

25 km WSW of Arimo, Idaho

· 9.9 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Oneida County 30 kmBannock County 33 kmPower County 44 kmFranklin County 59 kmCaribou County 82 kmBingham County 86 kmBear Lake County 93 kmCache County 97 kmCassia County 99 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 2.9 (ml)
Depth
9.9 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Oneida County, 30 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 145 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 42.4425, -112.4377. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Oneida County, ID 30 km (18 mi) NNE of here earthquakes near Oneida County
Bannock County, ID 33 km (20 mi) SSW of here earthquakes near Bannock County
Power County, ID 44 km (27 mi) SE of here earthquakes near Power County
Franklin County, ID 59 km (36 mi) WNW of here earthquakes near Franklin County
Caribou County, ID 82 km (51 mi) WSW of here earthquakes near Caribou County
Bingham County, ID 86 km (54 mi) S of here earthquakes near Bingham County

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

Aftershocks so far

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

  1. 2.5 25 km NNW of Snowville, Utah
  2. 2.3 26 km NNW of Snowville, Utah
  3. 1.6 2 km E of Malad City, Idaho
  4. 2.0 2 km ESE of Malad City, Idaho
  5. 1.7 4 km NE of Malad City, Idaho
  6. 2.4 2 km E of Malad City, Idaho
  7. 1.5 3 km ENE of Malad City, Idaho
  8. 1.6 3 km E of Malad City, Idaho
  9. 2.6 2 km ESE of Malad City, Idaho
  10. 1.8 2 km ESE of Malad City, Idaho
  11. 2.4 2 km ESE of Malad City, Idaho
  12. 1.6 3 km ESE of Malad City, Idaho
  13. 1.6 2 km ESE of Malad City, Idaho
  14. 1.6 2 km ESE of Malad City, Idaho
  15. 2.1 2 km ESE of Malad City, 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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