QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

23 km SE of Mammoth, Wyoming

· 6.1 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Park County 73 kmPark County 82 kmTeton County 85 kmGallatin County 93 kmFremont County 100 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 1.7 (ml)
Depth
6.1 km below the surface
Felt
no reports yet
Nearest
Park County, 73 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1497 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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 44.8072, -110.5288. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Park County, MT 73 km (45 mi) S of here earthquakes near Park County
Park County, WY 82 km (51 mi) WNW of here earthquakes near Park County
Teton County, WY 85 km (53 mi) N of here earthquakes near Teton County
Gallatin County, MT 93 km (58 mi) SSE of here earthquakes near Gallatin County
Fremont County, ID 100 km (62 mi) NE of here earthquakes near Fremont County
Sweet Grass County, MT 121 km (75 mi) SSW of here earthquakes near Sweet Grass County

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

Aftershocks so far

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

  1. 2.0 22 km SSW of Mammoth, Wyoming
  2. 2.3 Wyoming
  3. 1.7 22 km SSW of Mammoth, Wyoming
  4. 2.2 23 km SSW of Mammoth, Wyoming
  5. 1.9 22 km SSW of Mammoth, Wyoming
  6. 2.0 22 km SSW of Mammoth, Wyoming
  7. 2.4 22 km SSW of Mammoth, Wyoming
  8. 2.0 24 km SE of Mammoth, Wyoming
  9. 2.5 21 km SSW of Mammoth, Wyoming
  10. 2.9 21 km SSW of Mammoth, Wyoming
  11. 1.5 47 km SE of Mammoth, Wyoming
  12. 2.0 50 km SSE of Mammoth, Wyoming
  13. 1.8 49 km SSE of Mammoth, Wyoming
  14. 1.7 49 km SSE of Mammoth, Wyoming
  15. 1.8 50 km SSE of Mammoth, 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 4.4 on 2017-06-16 — it released about 9,100 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.