QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

7 km WSW of Clark Fork, Idaho

· 2.9 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Bonner County 35 kmKootenai County 59 kmBoundary County 75 kmLincoln County 77 kmPend Oreille County 86 kmShoshone County 90 kmSanders County 90 kmSpokane County 101 kmBenewah County 104 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 2.1 (ml)
Depth
2.9 km below the surface
Felt
no reports yet
Nearest
Bonner County, 35 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 347 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 48.1180, -116.2683. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bonner County, ID 35 km (22 mi) SE of here earthquakes near Bonner County
Kootenai County, ID 59 km (36 mi) NNE of here earthquakes near Kootenai County
Boundary County, ID 75 km (47 mi) SSE of here earthquakes near Boundary County
Lincoln County, MT 77 km (48 mi) SW of here earthquakes near Lincoln County
Pend Oreille County, WA 86 km (53 mi) ESE of here earthquakes near Pend Oreille County
Shoshone County, ID 90 km (56 mi) NNW of here earthquakes near Shoshone County

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

Aftershocks so far

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

  1. 2.3 2 km NE of Dover, Idaho
  2. 2.2 8 km WNW of Dover, Idaho
  3. 1.8 6 km SSW of Athol, Idaho
  4. 1.6 13 km NNW of Athol, Idaho
  5. 3.1 20 km N of Heron, Montana
  6. 2.1 12 km NNW of Kootenai, Idaho
  7. 1.6 11 km NNW of Kootenai, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.