QuakeIndex

explosion · reviewed by a seismologist

M 1.9ml

15 km NNE of Quincy, Washington

· -0.7 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grant County 27 kmDouglas County 42 kmKittitas County 74 kmChelan County 85 kmAdams County 102 kmLincoln County 104 kmFranklin County 112 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
-0.7 km below the surface
Felt
no reports yet
Nearest
Grant County, 27 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 553 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 21 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 5.8 730,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 520,000× the energy of this one
  3. Around the size people start to feel M 3.0 46× the energy of this one
  4. This earthquake M 1.9 about 21 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 47.3623, -119.7578. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grant County, WA 27 km (17 mi) NW of here earthquakes near Grant County
Douglas County, WA 42 km (26 mi) S of here earthquakes near Douglas County
Kittitas County, WA 74 km (46 mi) ENE of here earthquakes near Kittitas County
Chelan County, WA 85 km (53 mi) SE of here earthquakes near Chelan County
Adams County, WA 102 km (63 mi) WNW of here earthquakes near Adams County
Lincoln County, WA 104 km (64 mi) WSW of here earthquakes near Lincoln County

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

Aftershocks so far

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

  1. 1.9 4 km SW of Entiat, Washington
  2. 2.2 5 km N of Waterville, Washington
  3. 2.1 3 km E of Entiat, Washington
  4. 1.6 20 km SSE of Mansfield, Washington
  5. 1.7 4 km WNW of Waterville, Washington
  6. 1.5 7 km N of Waterville, Washington
  7. 1.5 5 km S of Entiat, Washington
  8. 1.6 5 km SW of Chelan Falls, Washington
  9. 1.7 6 km NNE of Waterville, Washington
  10. 2.1 12 km NE of Sunnyslope, Washington
  11. 2.8 12 km NE of Sunnyslope, Washington
  12. 2.2 2 km N of Waterville, Washington
  13. 1.7 10 km NW of Quincy, Washington
  14. 1.5 2 km SE of Entiat, Washington
  15. 1.6 5 km ENE of Entiat, 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.