QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

16 km SW of Ellensburg, Washington

· 14 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kittitas County 26 kmYakima County 48 kmGrant County 99 kmChelan County 108 kmKing County 109 kmPierce County 112 kmKlickitat County 113 kmBenton County 116 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
14 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Kittitas County, 26 km N
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. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 17 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 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 46.8885, -120.6900. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kittitas County, WA 26 km (16 mi) S of here earthquakes near Kittitas County
Yakima County, WA 48 km (30 mi) N of here earthquakes near Yakima County
Grant County, WA 99 km (62 mi) WSW of here earthquakes near Grant County
Chelan County, WA 108 km (67 mi) S of here earthquakes near Chelan County
King County, WA 109 km (68 mi) SE of here earthquakes near King County
Pierce County, WA 112 km (70 mi) E of here earthquakes near Pierce County

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

Aftershocks so far

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

  1. 2.0 9 km S of Ellensburg, Washington
  2. 1.8 17 km SW of Nile, Washington
  3. 1.8 17 km SW of Nile, Washington
  4. 1.9 16 km WSW of Nile, Washington
  5. 1.7 18 km SW of Nile, Washington
  6. 2.1 18 km SW of Nile, Washington
  7. 1.6 17 km SW of Nile, Washington
  8. 1.9 9 km S of Ellensburg, Washington
  9. 1.9 9 km S of Ellensburg, Washington
  10. 2.1 16 km WSW of Nile, Washington
  11. 1.7 5 km ESE of Kittitas, Washington
  12. 1.5 7 km ESE of Tampico, Washington
  13. 1.5 4 km NNW of Summitview, Washington
  14. 2.0 17 km SW of Nile, Washington
  15. 1.9 9 km SSW of Ellensburg, 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.