QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8ml

8 km W of Bennington, Idaho

· 1.4 km deep · released about 7.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Bear Lake County 14 kmFranklin County 41 kmCaribou County 45 kmLincoln County 64 kmBannock County 74 kmCache County 78 kmRich County 86 kmOneida County 93 kmBonneville County 113 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 3.8 (ml)
Depth
1.4 km below the surface
Felt
29 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Bear Lake County, 14 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 63 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 29 people have reported feeling it to USGS.

How big was it?

This earthquake released about 7.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 22,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 970× the energy of this one
  3. Magna, Utah 2020 M 5.7 680× the energy of this one
  4. This earthquake M 3.8 about 7.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 16× 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 42.3928, -111.4245. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bear Lake County, ID 14 km (9 mi) NW of here earthquakes near Bear Lake County
Franklin County, ID 41 km (25 mi) NE of here earthquakes near Franklin County
Caribou County, ID 45 km (28 mi) SSE of here earthquakes near Caribou County
Lincoln County, WY 64 km (40 mi) WNW of here earthquakes near Lincoln County
Bannock County, ID 74 km (46 mi) ESE of here earthquakes near Bannock County
Cache County, UT 78 km (48 mi) NNE of here earthquakes near Cache County

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

Aftershocks so far

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

  1. 1.5 11 km E of Bancroft, Idaho
  2. 1.6 9 km NW of Georgetown, Idaho
  3. 1.9 6 km W of Bennington, Idaho
  4. 1.8 7 km WSW of Bennington, Idaho
  5. 1.9 11 km NW of Georgetown, Idaho
  6. 1.9 9 km NW of Georgetown, Idaho
  7. 2.2 7 km WNW of Bennington, Idaho
  8. 1.5 6 km WSW of Bennington, Idaho
  9. 2.0 6 km W of Bennington, Idaho
  10. 3.2 6 km WSW of Bennington, Idaho
  11. 1.9 6 km WSW of Bennington, Idaho
  12. 3.0 6 km WSW of Bennington, Idaho
  13. 2.6 15 km W of Paris, Idaho
  14. 2.3 6 km W of Bennington, Idaho
  15. 1.7 5 km SSW of Georgetown, 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 5.3 on 2017-09-02 — it released about 170 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.