QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

2 km E of South Park, Wyoming

· 1.0 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Teton County 52 kmBonneville County 70 kmTeton County 75 kmMadison County 83 kmCaribou County 95 kmSublette County 100 kmFremont County 106 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
1.0 km below the surface
Felt
no reports yet
Nearest
Teton County, 52 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2696 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 17 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 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× the energy of this one
  4. This earthquake M 1.8 about 17 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 43.4227, -110.7612. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Teton County, ID 52 km (32 mi) SE of here earthquakes near Teton County
Bonneville County, ID 70 km (43 mi) E of here earthquakes near Bonneville County
Teton County, WY 75 km (46 mi) SSW of here earthquakes near Teton County
Madison County, ID 83 km (51 mi) ESE of here earthquakes near Madison County
Caribou County, ID 95 km (59 mi) NE of here earthquakes near Caribou County
Sublette County, WY 100 km (62 mi) NW of here earthquakes near Sublette County

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

Aftershocks so far

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

  1. 1.9 1 km E of Alpine Northeast, Wyoming
  2. 1.7 southern Idaho
  3. 1.6 5 km SSW of Alpine, Wyoming
  4. 1.9 32 km ESE of Kelly, Wyoming
  5. 1.9 23 km NE of Kelly, Wyoming
  6. 2.7 6 km S of Alpine, Wyoming
  7. 2.0 33 km ESE of Kelly, Wyoming
  8. 1.9 33 km ESE of Kelly, Wyoming
  9. 1.9 23 km NNE of Bondurant, Wyoming
  10. 2.2 southern Idaho
  11. 1.6 6 km NW of Wilson, Wyoming
  12. 3.6 17 km ESE of Kelly, Wyoming
  13. 2.1 12 km W of Wilson, Wyoming
  14. 1.7 10 km SSE of Victor, Idaho
  15. 1.7 11 km ENE of Alta, 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 29,000 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.