QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

8 km SSE of Mammoth, Wyoming

· 16 km deep · released about 7.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Park County 64 kmGallatin County 79 kmTeton County 97 kmPark County 97 kmFremont County 99 kmMadison County 108 kmSweet Grass County 116 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 1.6 (ml)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Park County, 64 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1236 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 7.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 7.8 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 44.9003, -110.6782. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Park County, MT 64 km (40 mi) S of here earthquakes near Park County
Gallatin County, MT 79 km (49 mi) SSE of here earthquakes near Gallatin County
Teton County, WY 97 km (60 mi) NNW of here earthquakes near Teton County
Park County, WY 97 km (60 mi) WNW of here earthquakes near Park County
Fremont County, ID 99 km (62 mi) NE of here earthquakes near Fremont County
Madison County, MT 108 km (67 mi) ESE of here earthquakes near Madison 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. 2.1 42 km E of West Yellowstone, Montana
  2. 1.6 22 km SSW of Mammoth, Wyoming
  3. 1.5 Wyoming
  4. 1.7 25 km ENE of West Yellowstone, Montana
  5. 2.4 Wyoming
  6. 2.0 26 km ENE of West Yellowstone, Montana
  7. 1.5 26 km SSW of Mammoth, Wyoming
  8. 1.9 26 km ENE of West Yellowstone, Montana
  9. 1.8 38 km SSE of Mammoth, Wyoming
  10. 1.7 Wyoming
  11. 2.8 17 km NE of West Yellowstone, Montana
  12. 1.9 44 km SE of Mammoth, Wyoming
  13. 1.6 16 km E of Hebgen Lake Estates, Montana
  14. 1.9 Wyoming
  15. 1.9 21 km NE of West Yellowstone, 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 13,000 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.