QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

3 km NNE of Green Bluff, Washington

· 17 km deep · released about 490 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Spokane County 28 kmKootenai County 46 kmBonner County 70 kmStevens County 74 kmPend Oreille County 77 kmBenewah County 85 kmLincoln County 92 kmWhitman County 107 kmBoundary County 116 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 2.8 (ml)
Depth
17 km below the surface
Felt
337 reports · strongest reported intensity IV
Nearest
Spokane County, 28 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2247 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 337 people have reported feeling it to USGS.

How big was it?

This earthquake released about 490 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 31,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 490 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 47.8532, -117.2538. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Spokane County, WA 28 km (18 mi) NNE of here earthquakes near Spokane County
Kootenai County, ID 46 km (29 mi) WNW of here earthquakes near Kootenai County
Bonner County, ID 70 km (44 mi) SW of here earthquakes near Bonner County
Stevens County, WA 74 km (46 mi) SE of here earthquakes near Stevens County
Pend Oreille County, WA 77 km (48 mi) S of here earthquakes near Pend Oreille County
Benewah County, ID 85 km (53 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

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

  1. 1.9 2 km NE of Fairwood, Washington
  2. 2.1 4 km NW of Rockford Bay, Idaho
  3. 2.2 2 km NW of Mead, Washington
  4. 1.7 9 km WSW of Newport, Washington
  5. 1.8 6 km SSW of Athol, Idaho
  6. 1.6 3 km ESE of Veradale, Washington
  7. 1.7 4 km SSW of Liberty Lake, Washington
  8. 1.6 13 km NNW of Athol, Idaho
  9. 1.6 13 km SSE of Liberty Lake, Washington
  10. 1.9 6 km NNW of Priest River, Idaho
  11. 1.8 2 km NNE of Fairwood, Washington
  12. 2.3 2 km NNE of Fairwood, Washington
  13. 1.8 20 km NE of Deer Park, Washington
  14. 2.1 9 km NNW of Airway Heights, Washington
  15. 1.5 8 km ENE of Four Lakes, 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.