QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

21 km NNE of Georgetown, Idaho

· 9.1 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Caribou County 24 kmBear Lake County 43 kmFranklin County 70 kmLincoln County 70 kmBannock County 76 kmBonneville County 85 kmBingham County 108 kmCache County 110 kmSublette 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 1.8 (md)
Depth
9.1 km below the surface
Felt
no reports yet
Nearest
Caribou County, 24 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 494 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 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 42.6688, -111.2973. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Caribou County, ID 24 km (15 mi) ESE of here earthquakes near Caribou County
Bear Lake County, ID 43 km (27 mi) N of here earthquakes near Bear Lake County
Franklin County, ID 70 km (43 mi) NE of here earthquakes near Franklin County
Lincoln County, WY 70 km (44 mi) NW of here earthquakes near Lincoln County
Bannock County, ID 76 km (47 mi) E of here earthquakes near Bannock County
Bonneville County, ID 85 km (53 mi) SSE of here earthquakes near Bonneville 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. 2.9 23 km WNW of Auburn, Wyoming
  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. 2.3 6 km W of Bennington, Idaho
  14. 1.7 5 km SSW of Georgetown, Idaho
  15. 2.4 17 km WSW of Auburn, Wyoming

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 210,000 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.