QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

17 km SE of Grace, Idaho

· 9.1 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Bear Lake County 29 kmFranklin County 36 kmCaribou County 38 kmBannock County 58 kmLincoln County 79 kmCache County 81 kmOneida County 81 kmRich County 96 kmBonneville 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 1.8 (ml)
Depth
9.1 km below the surface
Felt
no reports yet
Nearest
Bear Lake County, 29 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 869 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 42.4507, -111.6012. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bear Lake County, ID 29 km (18 mi) NW of here earthquakes near Bear Lake County
Franklin County, ID 36 km (22 mi) NNE of here earthquakes near Franklin County
Caribou County, ID 38 km (23 mi) S of here earthquakes near Caribou County
Bannock County, ID 58 km (36 mi) ESE of here earthquakes near Bannock County
Lincoln County, WY 79 km (49 mi) WNW of here earthquakes near Lincoln County
Cache County, UT 81 km (50 mi) N of here earthquakes near Cache 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. 1.9 17 km WNW of Paris, Idaho
  2. 2.0 8 km WSW of Bennington, Idaho
  3. 2.5 17 km ENE of Georgetown, Idaho
  4. 1.8 17 km WSW of Georgetown, Idaho
  5. 2.3 17 km SSE of Grace, Idaho
  6. 2.0 10 km NNW of Georgetown, Idaho
  7. 2.3 17 km W of Fairview, Wyoming
  8. 2.1 13 km WSW of Georgetown, Idaho
  9. 1.8 17 km WSW of Auburn, Wyoming
  10. 1.7 18 km WSW of Auburn, Wyoming
  11. 2.3 6 km S of Bancroft, Idaho
  12. 2.8 6 km SSW of Bancroft, Idaho
  13. 2.5 21 km E of Soda Springs, Idaho
  14. 2.0 3 km N of Grace, Idaho
  15. 1.5 14 km E of Soda Springs, 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 180,000 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.