QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

9 km NNW of Airway Heights, Washington

· 5.8 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Spokane County 20 kmLincoln County 61 kmKootenai County 70 kmStevens County 76 kmWhitman County 91 kmBenewah County 93 kmPend Oreille County 96 kmBonner County 100 kmAdams County 103 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
5.8 km below the surface
Felt
no reports yet
Nearest
Spokane County, 20 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 538 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 40 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 5.8 380,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
  3. Around the size people start to feel M 3.0 24× the energy of this one
  4. This earthquake M 2.1 about 40 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 47.7222, -117.6282. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Spokane County, WA 20 km (13 mi) NW of here earthquakes near Spokane County
Lincoln County, WA 61 km (38 mi) ENE of here earthquakes near Lincoln County
Kootenai County, ID 70 km (43 mi) W of here earthquakes near Kootenai County
Stevens County, WA 76 km (47 mi) SSE of here earthquakes near Stevens County
Whitman County, WA 91 km (57 mi) N of here earthquakes near Whitman County
Benewah County, ID 93 km (58 mi) NW of here earthquakes near Benewah County

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

Aftershocks so far

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

  1. 1.9 2 km NE of Fairwood, Washington
  2. 1.9 6 km ENE of Sprague, Washington
  3. 2.2 2 km NW of Mead, Washington
  4. 1.9 5 km ENE of Sprague, Washington
  5. 2.3 8 km NE of Sprague, Washington
  6. 1.7 6 km SE of Spangle, Washington
  7. 2.5 8 km ENE of Sprague, Washington
  8. 1.6 3 km ESE of Veradale, Washington
  9. 1.7 4 km SSW of Liberty Lake, Washington
  10. 2.0 6 km ENE of Sprague, Washington
  11. 1.9 12 km N of Reardan, Washington
  12. 2.4 7 km ENE of Sprague, Washington
  13. 1.8 2 km NNE of Fairwood, Washington
  14. 2.3 2 km NNE of Fairwood, Washington
  15. 1.8 20 km NE of Deer Park, Washington

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.