QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

4 km W of Rafter J Ranch, Wyoming

· 10 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Teton County 48 kmBonneville County 62 kmMadison County 77 kmTeton County 77 kmCaribou County 91 kmFremont County 102 kmSublette 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
10 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Teton County, 48 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1015 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 4 people have reported feeling it to USGS.

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 43.4238, -110.8493. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Teton County, ID 48 km (30 mi) SE of here earthquakes near Teton County
Bonneville County, ID 62 km (39 mi) E of here earthquakes near Bonneville County
Madison County, ID 77 km (48 mi) ESE of here earthquakes near Madison County
Teton County, WY 77 km (48 mi) SSW of here earthquakes near Teton County
Caribou County, ID 91 km (56 mi) NE of here earthquakes near Caribou County
Fremont County, ID 102 km (63 mi) SSE of here earthquakes near Fremont 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. 2.0 16 km E of Kelly, Wyoming
  2. 2.0 5 km WNW of Rafter J Ranch, Wyoming
  3. 1.7 5 km NE of Hoback, Wyoming
  4. 1.5 6 km NE of Hoback, Wyoming
  5. 2.4 6 km ENE of Moose Wilson Road, Wyoming
  6. 2.0 4 km NNE of Alpine Northeast, Wyoming
  7. 1.7 13 km ESE of Kelly, Wyoming
  8. 1.7 6 km NNW of Hoback, Wyoming
  9. 1.9 4 km E of Hoback, Wyoming
  10. 1.5 6 km ENE of Hoback, Wyoming
  11. 1.9 6 km NE of Hoback, Wyoming
  12. 1.5 11 km NNE of Alta, Wyoming
  13. 1.5 2 km SSE of Kelly, Wyoming
  14. 1.5 11 km SE of Kelly, Wyoming
  15. 1.5 11 km SE of Kelly, 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 4.8 on 2016-08-27 — it released about 32,000 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.