QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

22 km SSE of Packwood, Washington

· 0.1 km deep · released about 18 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Skamania County 52 kmLewis County 64 kmYakima County 64 kmPierce County 83 kmKlickitat County 86 kmCowlitz County 88 kmClark County 100 kmHood River County 100 kmKittitas County 105 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 1.9 (ml)
Depth
0.1 km below the surface
Felt
no reports yet
Nearest
Skamania County, 52 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2211 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 18 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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 46.4133, -121.5785. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Skamania County, WA 52 km (32 mi) NNE of here earthquakes near Skamania County
Lewis County, WA 64 km (40 mi) ESE of here earthquakes near Lewis County
Yakima County, WA 64 km (40 mi) W of here earthquakes near Yakima County
Pierce County, WA 83 km (52 mi) SSE of here earthquakes near Pierce County
Klickitat County, WA 86 km (54 mi) NW of here earthquakes near Klickitat County
Cowlitz County, WA 88 km (55 mi) ENE of here earthquakes near Cowlitz County

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

Aftershocks so far

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

  1. 1.7 36 km SSE of Morton, Washington
  2. 1.8 5 km ENE of Ashford, Washington
  3. 2.7 5 km ENE of Ashford, Washington
  4. 2.1 5 km ENE of Ashford, Washington
  5. 2.2 36 km SSE of Morton, Washington
  6. 1.7 32 km ESE of Packwood, Washington
  7. 2.5 15 km SSE of Ashford, Washington
  8. 1.6 22 km ENE of Ashford, Washington
  9. 2.4 17 km SW of Nile, Washington
  10. 2.1 7 km W of Packwood, Washington
  11. 2.9 7 km W of Packwood, Washington
  12. 1.6 5 km SW of Packwood, Washington
  13. 1.7 17 km NNE of Packwood, Washington
  14. 2.0 5 km WNW of Packwood, Washington
  15. 1.7 7 km ESE 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.