QuakeIndex

Earthquake · reviewed by a seismologist

M -0.5md

22 km ENE of Ashford, Washington

· -0.0 km deep · released about 0.005 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 37 kmLewis County 55 kmKing County 72 kmThurston County 81 kmKittitas County 88 kmYakima County 90 kmSkamania County 93 kmCowlitz County 101 kmKitsap County 110 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 -0.5 (md)
Depth
-0.0 km below the surface
Felt
no reports yet
Nearest
Pierce County, 37 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 23 hours 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 0.005 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 0.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 3,100,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,200,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 200,000× the energy of this one
  4. This earthquake M -0.5 about 0.005 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 46.8475, -121.7662. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 37 km (23 mi) SE of here earthquakes near Pierce County
Lewis County, WA 55 km (34 mi) ENE of here earthquakes near Lewis County
King County, WA 72 km (45 mi) S of here earthquakes near King County
Thurston County, WA 81 km (51 mi) E of here earthquakes near Thurston County
Kittitas County, WA 88 km (55 mi) WSW of here earthquakes near Kittitas County
Yakima County, WA 90 km (56 mi) WNW of here earthquakes near Yakima County

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

Aftershocks so far

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

  1. 0.3 11 km SSE of Carbonado, Washington
  2. 0.3 18 km SSE of Carbonado, Washington
  3. 0.1 20 km SE of Carbonado, Washington
  4. 0.3 12 km NNE of Ashford, Washington
  5. 2.1 3 km NNW of Kapowsin, Washington
  6. 1.0 4 km WSW of Mineral, Washington
  7. 1.3 14 km NNE of Ashford, Washington
  8. 0.8 26 km NNE of Packwood, Washington
  9. 0.6 26 km NNE of Packwood, Washington
  10. -0.1 16 km NNE 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.