QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

15 km SSE of Ashford, Washington

· 7.8 km deep · released about 160 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis County 32 kmPierce County 49 kmSkamania County 67 kmCowlitz County 73 kmThurston County 75 kmYakima County 95 kmKing County 96 kmClark County 103 kmKittitas County 112 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 2.5 (ml)
Depth
7.8 km below the surface
Felt
6 reports · strongest reported intensity III
Nearest
Lewis County, 32 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 584 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 160 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 95,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 68,000× the energy of this one
  3. Around the size people start to feel M 3.0 6× the energy of this one
  4. This earthquake M 2.5 about 160 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 46.6270, -121.9593. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis County, WA 32 km (20 mi) E of here earthquakes near Lewis County
Pierce County, WA 49 km (31 mi) SSE of here earthquakes near Pierce County
Skamania County, WA 67 km (42 mi) N of here earthquakes near Skamania County
Cowlitz County, WA 73 km (45 mi) NE of here earthquakes near Cowlitz County
Thurston County, WA 75 km (46 mi) ESE of here earthquakes near Thurston County
Yakima County, WA 95 km (59 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

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

  1. 1.6 1 km SE of Kapowsin, Washington
  2. 2.1 20 km SSE of Mossyrock, Washington
  3. 1.5 15 km NNE of Ashford, Washington
  4. 2.0 11 km S of Morton, Washington
  5. 1.5 19 km SSE of Carbonado, Washington
  6. 1.8 17 km SE of Carbonado, Washington
  7. 2.3 15 km NNE of Ashford, Washington
  8. 2.0 3 km ENE of Eatonville, Washington
  9. 1.9 10 km NE of Ashford, Washington
  10. 1.6 6 km ENE of Mossyrock, Washington
  11. 2.2 13 km NE of Ashford, Washington
  12. 2.4 10 km NNE of Ashford, Washington
  13. 1.6 27 km S of Morton, Washington
  14. 2.5 27 km S of Morton, Washington
  15. 2.4 14 km SW of Alder, 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.