QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

2 km WNW of Federal Way, Washington

· 22 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 34 kmKitsap County 41 kmKing County 42 kmThurston County 58 kmMason County 63 kmLewis County 84 kmSnohomish County 91 kmIsland County 95 kmJefferson County 104 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
22 km below the surface
Felt
no reports yet
Nearest
Pierce County, 34 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 554 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 10 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 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 95× the energy of this one
  4. This earthquake M 1.7 about 10 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 47.3330, -122.3380. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 34 km (21 mi) NNW of here earthquakes near Pierce County
Kitsap County, WA 41 km (26 mi) SE of here earthquakes near Kitsap County
King County, WA 42 km (26 mi) WSW of here earthquakes near King County
Thurston County, WA 58 km (36 mi) NE of here earthquakes near Thurston County
Mason County, WA 63 km (39 mi) E of here earthquakes near Mason County
Lewis County, WA 84 km (52 mi) N of here earthquakes near Lewis County

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

Aftershocks so far

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

  1. 1.5 1 km N of Artondale, Washington
  2. 1.6 1 km SE of Kapowsin, Washington
  3. 2.6 6 km SSW of Lake Morton-Berrydale, Washington
  4. 2.1 5 km SE of Lea Hill, Washington
  5. 1.7 6 km ENE of Hobart, Washington
  6. 1.5 13 km ESE of Enumclaw, Washington
  7. 2.4 1 km E of Enetai, Washington
  8. 2.7 2 km NNE of Gorst, Washington
  9. 1.7 1 km SE of Kapowsin, Washington
  10. 2.2 5 km S of Seabeck, Washington
  11. 1.7 12 km W of Greenwater, Washington
  12. 2.0 4 km ESE of McKenna, Washington
  13. 1.6 6 km ESE of Hobart, Washington
  14. 1.9 6 km WSW of Chico, Washington
  15. 1.6 2 km N of Seattle, 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.