QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

9 km WSW of Spirit Lake, Idaho

· 0.5 km deep · released about 46 lb of TNT

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10 km30 km60 km120 km N Kootenai County 36 kmSpokane County 47 kmBonner County 51 kmPend Oreille County 71 kmStevens County 82 kmBenewah County 84 kmBoundary County 99 kmShoshone County 105 kmLincoln County 114 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 (md)
Depth
0.5 km below the surface
Felt
no reports yet
Nearest
Kootenai County, 36 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1510 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 46 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 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 47.9327, -116.9787. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kootenai County, ID 36 km (22 mi) NW of here earthquakes near Kootenai County
Spokane County, WA 47 km (29 mi) NE of here earthquakes near Spokane County
Bonner County, ID 51 km (32 mi) SSW of here earthquakes near Bonner County
Pend Oreille County, WA 71 km (44 mi) SSE of here earthquakes near Pend Oreille County
Stevens County, WA 82 km (51 mi) SE of here earthquakes near Stevens County
Benewah County, ID 84 km (52 mi) NNW of here earthquakes near Benewah County

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

Aftershocks so far

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

  1. 1.9 2 km NE of Fairwood, Washington
  2. 2.3 2 km NE of Dover, Idaho
  3. 2.2 8 km WNW of Dover, Idaho
  4. 2.1 4 km NW of Rockford Bay, Idaho
  5. 2.2 2 km NW of Mead, Washington
  6. 1.7 9 km WSW of Newport, Washington
  7. 1.8 6 km SSW of Athol, Idaho
  8. 1.6 3 km ESE of Veradale, Washington
  9. 1.7 4 km SSW of Liberty Lake, Washington
  10. 1.6 13 km NNW of Athol, Idaho
  11. 1.6 13 km SSE of Liberty Lake, Washington
  12. 1.9 6 km NNW of Priest River, Idaho
  13. 1.8 2 km NNE of Fairwood, Washington
  14. 2.3 2 km NNE of Fairwood, Washington
  15. 2.1 8 km WNW of Dover, 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.