QuakeIndex

explosion · reviewed by a seismologist

M 1.9ml

6 km ESE of Spangle, Washington

· -0.8 km deep · released about 23 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Spokane County 26 kmBenewah County 55 kmKootenai County 55 kmWhitman County 57 kmLatah County 78 kmLincoln County 86 kmAdams County 101 kmShoshone County 107 kmGarfield County 109 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 1.9 (ml)
Depth
-0.8 km below the surface
Felt
no reports yet
Nearest
Spokane County, 26 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 887 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 23 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 660,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 470,000× the energy of this one
  3. Around the size people start to feel M 3.0 42× the energy of this one
  4. This earthquake M 1.9 about 23 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 47.3982, -117.3062. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Spokane County, WA 26 km (16 mi) SSE of here earthquakes near Spokane County
Benewah County, ID 55 km (34 mi) WNW of here earthquakes near Benewah County
Kootenai County, ID 55 km (34 mi) SW of here earthquakes near Kootenai County
Whitman County, WA 57 km (36 mi) NNE of here earthquakes near Whitman County
Latah County, ID 78 km (48 mi) NW of here earthquakes near Latah County
Lincoln County, WA 86 km (53 mi) ESE of here earthquakes near Lincoln County

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

Aftershocks so far

20 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. 1.8 7 km SSW of Tekoa, Washington
  5. 1.7 6 km SE of Spangle, Washington
  6. 1.6 3 km ESE of Veradale, Washington
  7. 1.7 4 km SSW of Liberty Lake, Washington
  8. 1.6 13 km SSE of Liberty Lake, Washington
  9. 2.0 3 km N of Harrison, Idaho
  10. 1.8 2 km NNE of Fairwood, Washington
  11. 2.3 2 km NNE of Fairwood, Washington
  12. 2.1 9 km NNW of Airway Heights, Washington
  13. 1.5 8 km ENE of Four Lakes, Washington
  14. 2.0 4 km E of Plummer, Idaho
  15. 1.6 10 km NNW of Airway Heights, 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

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