QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

36 km NE of Spencer, Idaho

· 8.2 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Clark County 51 kmFremont County 55 kmMadison County 79 kmMadison County 94 kmJefferson County 97 kmBeaverhead County 97 kmTeton County 110 kmGallatin 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 1.7 (ml)
Depth
8.2 km below the surface
Felt
no reports yet
Nearest
Clark County, 51 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1066 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 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 970,000× the energy of this one
  3. Around the size people start to feel M 3.0 86× 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 44.6135, -111.9017. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Clark County, ID 51 km (32 mi) NE of here earthquakes near Clark County
Fremont County, ID 55 km (34 mi) NW of here earthquakes near Fremont County
Madison County, MT 79 km (49 mi) S of here earthquakes near Madison County
Madison County, ID 94 km (58 mi) NNW of here earthquakes near Madison County
Jefferson County, ID 97 km (60 mi) NNE of here earthquakes near Jefferson County
Beaverhead County, MT 97 km (60 mi) SE of here earthquakes near Beaverhead 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. 2.0 23 km N of Spencer, Idaho
  2. 1.8 23 km N of Spencer, Idaho
  3. 1.6 32 km W of Hebgen Lake Estates, Montana
  4. 1.7 26 km W of Hebgen Lake Estates, Montana
  5. 1.7 31 km NNE of Spencer, Idaho
  6. 1.8 26 km W of Hebgen Lake Estates, Montana
  7. 1.5 26 km W of Hebgen Lake Estates, Montana
  8. 2.3 26 km W of Hebgen Lake Estates, Montana
  9. 3.1 27 km W of Hebgen Lake Estates, Montana
  10. 1.5 27 km W of Hebgen Lake Estates, Montana
  11. 2.0 27 km W of Hebgen Lake Estates, Montana
  12. 2.0 37 km W of Hebgen Lake Estates, Montana
  13. 2.3 47 km NW of Island Park, Idaho
  14. 1.6 31 km SSE of Virginia City, Montana
  15. 1.8 40 km NNE of Spencer, Idaho

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 4.3 on 2016-06-13 — it released about 8,800 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.