QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

16 km NE of Lima, Montana

· 11 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Clark County 50 kmBeaverhead County 58 kmMadison County 77 kmFremont County 94 kmJefferson County 105 kmLemhi 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 2.6 (ml)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Clark County, 50 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1983 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 44.7344, -112.4273. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Clark County, ID 50 km (31 mi) N of here earthquakes near Clark County
Beaverhead County, MT 58 km (36 mi) SE of here earthquakes near Beaverhead County
Madison County, MT 77 km (48 mi) SSW of here earthquakes near Madison County
Fremont County, ID 94 km (59 mi) NW of here earthquakes near Fremont County
Jefferson County, ID 105 km (65 mi) N of here earthquakes near Jefferson County
Lemhi County, ID 117 km (73 mi) E of here earthquakes near Lemhi County

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

Aftershocks so far

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

  1. 1.5 2 km S of Lima, Montana
  2. 2.4 1 km SSE of Lima, Montana
  3. 2.6 0 km S of Lima, Montana
  4. 3.3 3 km SSE of Lima, Montana
  5. 2.5 2 km SSE of Lima, Montana
  6. 1.7 14 km NW of Lima, Montana
  7. 1.9 23 km SSE of Dillon, Montana
  8. 1.7 30 km NNE of Spencer, Idaho
  9. 2.3 34 km S of Virginia City, Montana
  10. 1.5 37 km NE of Spencer, Idaho
  11. 1.5 7 km ENE of Lima, Montana
  12. 2.9 6 km ENE of Lima, Montana
  13. 1.5 9 km ENE of Lima, Montana
  14. 1.6 41 km S of Virginia City, Montana
  15. 1.6 Idaho-Montana border region

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 1,000 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.