QuakeIndex

explosion · reviewed by a seismologist

M 1.7ml

10 km NW of Quincy, Washington

· -0.8 km deep · released about 9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grant County 37 kmDouglas County 52 kmKittitas County 59 kmChelan County 80 kmYakima County 112 kmAdams County 113 kmFranklin County 116 kmLincoln County 119 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 1.7 (ml)
Depth
-0.8 km below the surface
Felt
no reports yet
Nearest
Grant County, 37 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 568 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 9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.7 about 9 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 47.3018, -119.9402. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grant County, WA 37 km (23 mi) WNW of here earthquakes near Grant County
Douglas County, WA 52 km (32 mi) SSW of here earthquakes near Douglas County
Kittitas County, WA 59 km (37 mi) ENE of here earthquakes near Kittitas County
Chelan County, WA 80 km (50 mi) SE of here earthquakes near Chelan County
Yakima County, WA 112 km (70 mi) NNE of here earthquakes near Yakima County
Adams County, WA 113 km (70 mi) WNW of here earthquakes near Adams County

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

Aftershocks so far

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

  1. 0.9 5 km ENE of Entiat, Washington
  2. 2.3 4 km NW of Waterville, Washington
  3. 1.7 3 km ESE of Kittitas, Washington
  4. 1.5 7 km SSE of Chelan Falls, Washington
  5. 1.6 13 km E of Waterville, Washington
  6. 2.5 4 km NW of Waterville, Washington
  7. 1.8 2 km NNE of Entiat, Washington
  8. 1.7 5 km ESE of Kittitas, Washington
  9. 2.1 8 km S of Entiat, Washington
  10. 1.6 5 km NW of Waterville, Washington
  11. 1.9 7 km ESE of Kittitas, Washington
  12. 1.9 4 km SW of Entiat, Washington
  13. 1.7 5 km W of Vantage, Washington
  14. 1.8 5 km SE of Kittitas, Washington
  15. 2.2 5 km N of Waterville, 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.