QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

9 km NE of Ashford, Washington

· 7.3 km deep · released about 9.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 31 kmLewis County 42 kmThurston County 69 kmKing County 76 kmSkamania County 88 kmCowlitz County 89 kmYakima County 100 kmKittitas County 102 kmKitsap County 106 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 1.7 (ml)
Depth
7.3 km below the surface
Felt
no reports yet
Nearest
Pierce County, 31 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 565 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 9.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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 46.8155, -121.9425. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 31 km (19 mi) SSE of here earthquakes near Pierce County
Lewis County, WA 42 km (26 mi) NE of here earthquakes near Lewis County
Thurston County, WA 69 km (43 mi) E of here earthquakes near Thurston County
King County, WA 76 km (47 mi) S of here earthquakes near King County
Skamania County, WA 88 km (55 mi) N of here earthquakes near Skamania County
Cowlitz County, WA 89 km (55 mi) NE of here earthquakes near Cowlitz County

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

Aftershocks so far

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

  1. 1.6 6 km NNW of Ashford, Washington
  2. 1.5 13 km W of Greenwater, Washington
  3. 1.6 22 km ENE of Ashford, Washington
  4. 1.6 2 km SSE of Kapowsin, Washington
  5. 1.9 8 km NE of Ashford, Washington
  6. 1.6 24 km ENE of Ashford, Washington
  7. 1.6 2 km SSW of Kapowsin, Washington
  8. 1.6 13 km W of Greenwater, Washington
  9. 1.6 0 km ESE of Buckley, Washington
  10. 1.8 12 km W of Greenwater, Washington
  11. 1.9 11 km ESE of Enumclaw, Washington
  12. 1.5 22 km ENE of Ashford, Washington
  13. 2.0 22 km ENE of Ashford, Washington
  14. 2.0 22 km ENE of Ashford, Washington
  15. 2.0 22 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.