QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

35 km SE of Leadore, Idaho

· 10 km deep · released about 7.1 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Clark County 57 kmBeaverhead County 75 kmLemhi County 85 kmButte County 88 kmJefferson County 93 kmCuster 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 1.6 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Clark County, 57 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2366 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 7.1 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 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.1 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 44.4673, -113.0250. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Clark County, ID 57 km (35 mi) WNW of here earthquakes near Clark County
Beaverhead County, MT 75 km (47 mi) S of here earthquakes near Beaverhead County
Lemhi County, ID 85 km (53 mi) SE of here earthquakes near Lemhi County
Butte County, ID 88 km (55 mi) N of here earthquakes near Butte County
Jefferson County, ID 93 km (58 mi) NW of here earthquakes near Jefferson County
Custer County, ID 100 km (62 mi) ENE of here earthquakes near Custer County

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

Aftershocks so far

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

  1. 1.5 2 km S of Lima, Montana
  2. 1.8 2 km SSE of Lima, Montana
  3. 2.5 2 km S of Lima, Montana
  4. 2.4 2 km S of Lima, Montana
  5. 2.3 2 km SSE of Lima, Montana
  6. 1.7 2 km S of Lima, Montana
  7. 1.8 2 km SSE of Lima, Montana
  8. 1.8 2 km S of Lima, Montana
  9. 1.6 Idaho-Montana border region
  10. 4.2 3 km S of Lima, Montana
  11. 1.5 1 km S of Lima, Montana
  12. 1.5 2 km S of Lima, Montana
  13. 2.4 1 km SSE of Lima, Montana
  14. 2.6 0 km S of Lima, Montana
  15. 3.3 3 km SSE 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 34,000 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.