QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

4 km W of Ashford, Washington

· 16 km deep · released about 650 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis County 30 kmPierce County 32 kmThurston County 59 kmCowlitz County 78 kmKing County 83 kmSkamania County 83 kmMason County 105 kmKitsap County 106 kmYakima County 109 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 2.9 (ml)
Depth
16 km below the surface
Felt
23 reports · strongest reported intensity IV
Measured shaking
intensity II (ShakeMap)
Nearest
Lewis County, 30 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1717 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 23 people have reported feeling it to USGS.

How big was it?

This earthquake released about 650 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 23,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 650 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 46.7657, -122.0895. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis County, WA 30 km (19 mi) NE of here earthquakes near Lewis County
Pierce County, WA 32 km (20 mi) S of here earthquakes near Pierce County
Thurston County, WA 59 km (37 mi) ESE of here earthquakes near Thurston County
Cowlitz County, WA 78 km (48 mi) NE of here earthquakes near Cowlitz County
King County, WA 83 km (52 mi) SSW of here earthquakes near King County
Skamania County, WA 83 km (52 mi) N of here earthquakes near Skamania County

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

Aftershocks so far

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

  1. 1.6 2 km E of Kapowsin, Washington
  2. 2.3 12 km NW of Morton, Washington
  3. 1.7 1 km WNW of Bonney Lake, Washington
  4. 2.9 12 km NW of Morton, Washington
  5. 1.6 5 km WNW of Ashford, Washington
  6. 1.6 6 km ENE of Elbe, Washington
  7. 2.1 7 km W of Packwood, Washington
  8. 1.8 7 km WSW of Morton, Washington
  9. 2.7 7 km WSW of Morton, Washington
  10. 2.9 7 km W of Packwood, Washington
  11. 1.6 10 km SSE of Mossyrock, Washington
  12. 1.5 24 km ENE of Ashford, Washington
  13. 1.8 1 km NNE of Kapowsin, Washington
  14. 1.5 25 km ENE of Ashford, Washington
  15. 2.1 24 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.