QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

13 km W of Cliffdell, Washington

· 0.9 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kittitas County 47 kmYakima County 69 kmPierce County 69 kmKing County 73 kmLewis County 96 kmChelan County 110 kmSkamania 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
0.9 km below the surface
Felt
no reports yet
Nearest
Kittitas County, 47 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3074 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 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× 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 46.9647, -121.2493. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kittitas County, WA 47 km (29 mi) WSW of here earthquakes near Kittitas County
Yakima County, WA 69 km (43 mi) NW of here earthquakes near Yakima County
Pierce County, WA 69 km (43 mi) E of here earthquakes near Pierce County
King County, WA 73 km (46 mi) SE of here earthquakes near King County
Lewis County, WA 96 km (60 mi) ENE of here earthquakes near Lewis County
Chelan County, WA 110 km (69 mi) SSW of here earthquakes near Chelan County

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

Aftershocks so far

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

  1. 1.6 13 km NNW of Thorp, Washington
  2. 1.6 23 km ENE of Ashford, Washington
  3. 1.6 22 km ENE of Ashford, Washington
  4. 1.6 24 km ENE of Ashford, Washington
  5. 1.7 15 km SW of Nile, Washington
  6. 1.5 22 km ENE of Ashford, Washington
  7. 2.0 22 km ENE of Ashford, Washington
  8. 2.0 22 km ENE of Ashford, Washington
  9. 2.0 22 km ENE of Ashford, Washington
  10. 1.6 16 km SW of Nile, Washington
  11. 2.0 13 km WSW of Tieton, Washington
  12. 2.0 21 km ESE of Packwood, Washington
  13. 1.5 22 km ENE of Ashford, Washington
  14. 2.0 12 km NNE of Cliffdell, Washington
  15. 1.8 23 km ENE of Ashford, 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.