QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

26 km ESE of Packwood, Washington

· 8.7 km deep · released about 1,200 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yakima County 47 kmSkamania County 73 kmLewis County 79 kmKittitas County 83 kmPierce County 84 kmKlickitat County 85 kmCowlitz County 109 kmKing County 113 kmHood River County 116 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 3.1 (ml)
Depth
8.7 km below the surface
Felt
2 reports · strongest reported intensity II
Measured shaking
intensity II (ShakeMap)
Nearest
Yakima County, 47 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1565 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,200 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 290,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,100× the energy of this one
  4. This earthquake M 3.1 about 1,200 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.2× more

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 46.5302, -121.3475. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yakima County, WA 47 km (29 mi) W of here earthquakes near Yakima County
Skamania County, WA 73 km (45 mi) NE of here earthquakes near Skamania County
Lewis County, WA 79 km (49 mi) E of here earthquakes near Lewis County
Kittitas County, WA 83 km (52 mi) SW of here earthquakes near Kittitas County
Pierce County, WA 84 km (52 mi) SE of here earthquakes near Pierce County
Klickitat County, WA 85 km (53 mi) NNW of here earthquakes near Klickitat County

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

Aftershocks so far

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

  1. 1.6 23 km ENE of Ashford, Washington
  2. 1.7 30 km SSW of Packwood, Washington
  3. 1.6 22 km ENE of Ashford, Washington
  4. 1.8 11 km N of Packwood, Washington
  5. 1.8 20 km ESE of Packwood, Washington
  6. 1.9 20 km ESE of Packwood, Washington
  7. 1.6 20 km ESE of Packwood, Washington
  8. 1.8 20 km ESE of Packwood, Washington
  9. 1.6 20 km ESE of Packwood, Washington
  10. 2.5 20 km ESE of Packwood, Washington
  11. 2.3 15 km SW of Nile, Washington
  12. 1.8 16 km SW of Nile, Washington
  13. 1.8 13 km W of Cliffdell, Washington
  14. 2.7 6 km WSW of Packwood, Washington
  15. 1.7 17 km N of Packwood, 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.