QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

11 km SSW of Cashmere, Washington

· 1.2 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kittitas County 36 kmChelan County 50 kmDouglas County 70 kmGrant County 81 kmKing County 100 kmYakima County 109 kmSnohomish County 118 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 1.8 (ml)
Depth
1.2 km below the surface
Felt
no reports yet
Nearest
Kittitas County, 36 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1741 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 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 47.4223, -120.5038. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kittitas County, WA 36 km (22 mi) NNE of here earthquakes near Kittitas County
Chelan County, WA 50 km (31 mi) S of here earthquakes near Chelan County
Douglas County, WA 70 km (44 mi) WSW of here earthquakes near Douglas County
Grant County, WA 81 km (51 mi) WNW of here earthquakes near Grant County
King County, WA 100 km (62 mi) E of here earthquakes near King County
Yakima County, WA 109 km (68 mi) N of here earthquakes near Yakima County

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

Aftershocks so far

41 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. 1.6 12 km NW of Thorp, Washington
  4. 1.6 12 km W of Entiat, Washington
  5. 1.9 10 km SSW of Granite Falls, Washington
  6. 1.8 7 km W of Entiat, Washington
  7. 2.5 4 km NW of Waterville, Washington
  8. 1.8 2 km NNE of Entiat, Washington
  9. 2.6 10 km WNW of Entiat, Washington
  10. 1.7 17 km W of Leavenworth, Washington
  11. 1.7 7 km W of Entiat, Washington
  12. 2.1 8 km S of Entiat, Washington
  13. 1.6 5 km NW of Waterville, Washington
  14. 1.9 11 km WNW of Thorp, Washington
  15. 1.9 4 km SW 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.