QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

29 km NE of Lima, Montana

· 13 km deep · released about 6.2 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Clark County 56 kmBeaverhead County 60 kmMadison County 66 kmFremont County 91 kmJefferson County 111 kmGallatin County 120 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 1.5 (ml)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Clark County, 56 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2492 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 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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 44.7963, -112.2948. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Clark County, ID 56 km (35 mi) N of here earthquakes near Clark County
Beaverhead County, MT 60 km (37 mi) SE of here earthquakes near Beaverhead County
Madison County, MT 66 km (41 mi) SSW of here earthquakes near Madison County
Fremont County, ID 91 km (56 mi) NW of here earthquakes near Fremont County
Jefferson County, ID 111 km (69 mi) N of here earthquakes near Jefferson County
Gallatin County, MT 120 km (74 mi) SW of here earthquakes near Gallatin County

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

Aftershocks so far

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

  1. 1.8 28 km SSE of Virginia City, Montana
  2. 1.6 17 km ESE of Dillon, Montana
  3. 1.7 17 km ESE of Dillon, Montana
  4. 1.6 17 km ESE of Dillon, Montana
  5. 2.3 41 km NW of Island Park, Idaho
  6. 1.5 16 km ESE of Dillon, Montana
  7. 2.0 36 km NNE of Spencer, Idaho
  8. 1.7 17 km ESE of Dillon, Montana
  9. 1.7 17 km ESE of Dillon, Montana
  10. 2.0 29 km SSE of Virginia City, Montana
  11. 1.6 3 km ENE of Lima, Montana
  12. 1.5 18 km ESE of Dillon, Montana
  13. 2.7 23 km ESE of Dillon, Montana
  14. 1.6 23 km ESE of Dillon, Montana
  15. 2.6 16 km NE of Lima, 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 4.6 on 2019-04-09 — it released about 39,000 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.