QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

10 km WSW of Packwood, Washington

· 2.1 km deep · released about 20 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis County 46 kmSkamania County 61 kmPierce County 62 kmCowlitz County 80 kmYakima County 81 kmThurston County 90 kmClark County 103 kmKing County 104 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
2.1 km below the surface
Felt
no reports yet
Nearest
Lewis County, 46 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3176 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 20 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 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 46.5573, -121.7828. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis County, WA 46 km (28 mi) E of here earthquakes near Lewis County
Skamania County, WA 61 km (38 mi) NNE of here earthquakes near Skamania County
Pierce County, WA 62 km (38 mi) SSE of here earthquakes near Pierce County
Cowlitz County, WA 80 km (49 mi) ENE of here earthquakes near Cowlitz County
Yakima County, WA 81 km (50 mi) W of here earthquakes near Yakima County
Thurston County, WA 90 km (56 mi) ESE of here earthquakes near Thurston County

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

Aftershocks so far

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

  1. 2.1 22 km ENE of Ashford, Washington
  2. 1.9 15 km N of Ashford, Washington
  3. 1.7 8 km S of Morton, Washington
  4. 2.1 Washington
  5. 1.9 23 km ENE of Ashford, Washington
  6. 1.5 23 km ENE of Ashford, Washington
  7. 1.7 9 km NE of Ashford, Washington
  8. 1.5 23 km ENE of Ashford, Washington
  9. 1.7 23 km ENE of Ashford, Washington
  10. 1.6 23 km ENE of Ashford, Washington
  11. 1.6 21 km ESE of Packwood, Washington
  12. 1.5 22 km ENE of Ashford, Washington
  13. 2.3 15 km S of Packwood, Washington
  14. 1.9 37 km SSE of Morton, Washington
  15. 1.6 15 km NE 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.