QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

17 km NNE of Packwood, Washington

· 3.9 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 54 kmLewis County 63 kmYakima County 73 kmKittitas County 81 kmKing County 84 kmSkamania County 86 kmThurston County 96 kmCowlitz County 104 kmKlickitat County 117 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 1.7 (ml)
Depth
3.9 km below the surface
Felt
no reports yet
Nearest
Pierce County, 54 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1643 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 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 46.7560, -121.5913. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 54 km (33 mi) SE of here earthquakes near Pierce County
Lewis County, WA 63 km (39 mi) ENE of here earthquakes near Lewis County
Yakima County, WA 73 km (45 mi) WNW of here earthquakes near Yakima County
Kittitas County, WA 81 km (50 mi) WSW of here earthquakes near Kittitas County
King County, WA 84 km (52 mi) SSE of here earthquakes near King County
Skamania County, WA 86 km (53 mi) NNE of here earthquakes near Skamania County

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

Aftershocks so far

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

  1. 3.1 19 km NE of Packwood, Washington
  2. 1.5 8 km E of Ashford, Washington
  3. 2.4 13 km NNE of Ashford, Washington
  4. 1.7 11 km NNE of Ashford, Washington
  5. 2.8 10 km NNE of Ashford, Washington
  6. 2.0 10 km NNE of Ashford, Washington
  7. 2.2 10 km NNE of Ashford, Washington
  8. 1.6 14 km NNE of Ashford, Washington
  9. 1.5 21 km SE of Morton, Washington
  10. 1.5 10 km NNE of Ashford, Washington
  11. 1.6 Washington
  12. 1.7 8 km E of Ashford, Washington
  13. 1.7 23 km ENE of Ashford, Washington
  14. 2.4 3 km E of Carbonado, Washington
  15. 1.7 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.