QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

47 km SSE of Mammoth, Wyoming

· 4.8 km deep · released about 340 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Teton County 58 kmPark County 72 kmFremont County 87 kmPark County 99 kmTeton County 107 kmGallatin County 117 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 2.7 (ml)
Depth
4.8 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Teton County, 58 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2763 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 44.5718, -110.5008. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Teton County, WY 58 km (36 mi) N of here earthquakes near Teton County
Park County, WY 72 km (45 mi) W of here earthquakes near Park County
Fremont County, ID 87 km (54 mi) ENE of here earthquakes near Fremont County
Park County, MT 99 km (62 mi) S of here earthquakes near Park County
Teton County, ID 107 km (66 mi) NNE of here earthquakes near Teton County
Gallatin County, MT 117 km (73 mi) SSE of here earthquakes near Gallatin 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. 2.8 31 km ESE of West Yellowstone, Montana
  2. 1.7 71 km NNE of Kelly, Wyoming
  3. 1.6 45 km SE of West Yellowstone, Montana
  4. 1.8 45 km SSE of Mammoth, Wyoming
  5. 2.1 35 km S of Silver Gate, Montana
  6. 1.7 35 km SSW of Silver Gate, Montana
  7. 1.6 34 km SSW of Silver Gate, Montana
  8. 3.3 35 km SSW of Silver Gate, Montana
  9. 2.1 37 km S of Silver Gate, Montana
  10. 1.9 49 km SSE of Mammoth, Wyoming
  11. 1.6 42 km ESE of West Yellowstone, Montana
  12. 1.5 46 km SSE of Mammoth, Wyoming
  13. 1.6 12 km NE of West Yellowstone, Montana
  14. 1.5 16 km SE of West Yellowstone, Montana
  15. 1.5 34 km SW of Silver Gate, Montana

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 4.4 on 2017-06-16 — it released about 310 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.