QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

5 km ENE of Bancroft, Idaho

· 2.5 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Caribou County 23 kmBannock County 34 kmFranklin County 62 kmBear Lake County 64 kmBingham County 71 kmBonneville County 75 kmPower County 84 kmOneida County 84 kmLincoln County 109 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 2.1 (ml)
Depth
2.5 km below the surface
Felt
no reports yet
Nearest
Caribou County, 23 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2638 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 51 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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 42.7345, -111.8202. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Caribou County, ID 23 km (14 mi) WSW of here earthquakes near Caribou County
Bannock County, ID 34 km (21 mi) E of here earthquakes near Bannock County
Franklin County, ID 62 km (39 mi) N of here earthquakes near Franklin County
Bear Lake County, ID 64 km (40 mi) NW of here earthquakes near Bear Lake County
Bingham County, ID 71 km (44 mi) SE of here earthquakes near Bingham County
Bonneville County, ID 75 km (47 mi) SSW of here earthquakes near Bonneville County

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

Aftershocks so far

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

  1. 2.9 9 km ESE of Soda Springs, Idaho
  2. 2.0 11 km ESE of Soda Springs, Idaho
  3. 2.7 12 km E of Soda Springs, Idaho
  4. 1.7 17 km WSW of Georgetown, Idaho
  5. 1.9 13 km ESE of Soda Springs, Idaho
  6. 2.0 13 km E of Soda Springs, Idaho
  7. 2.0 17 km E of Soda Springs, Idaho
  8. 2.2 12 km WSW of Georgetown, Idaho
  9. 2.0 3 km WNW of Georgetown, Idaho
  10. 1.6 12 km WSW of Georgetown, Idaho
  11. 1.7 3 km W of Georgetown, Idaho
  12. 1.9 15 km E of Soda Springs, Idaho
  13. 1.7 4 km SSE of Georgetown, Idaho
  14. 2.0 2 km SSW of Georgetown, Idaho
  15. 1.9 4 km S 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 53,000 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.