QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

2 km NNW of Federal Way, Washington

· 25 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 35 kmKing County 40 kmKitsap County 41 kmThurston County 60 kmMason County 64 kmLewis County 85 kmSnohomish County 89 kmIsland County 94 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 1.5 (ml)
Depth
25 km below the surface
Felt
no reports yet
Nearest
Pierce County, 35 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 983 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 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 47.3470, -122.3230. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 35 km (22 mi) NNW of here earthquakes near Pierce County
King County, WA 40 km (25 mi) WSW of here earthquakes near King County
Kitsap County, WA 41 km (25 mi) SE of here earthquakes near Kitsap County
Thurston County, WA 60 km (37 mi) NE of here earthquakes near Thurston County
Mason County, WA 64 km (40 mi) E of here earthquakes near Mason County
Lewis County, WA 85 km (53 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

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

  1. 1.6 3 km WNW of Shoreline, Washington
  2. 2.3 1 km S of Fall City, Washington
  3. 2.0 2 km ESE of Ruston, Washington
  4. 1.5 6 km SE of Maplewood, Washington
  5. 1.8 5 km ESE of Maplewood, Washington
  6. 1.8 7 km SSE of Seabeck, Washington
  7. 1.6 3 km NW of Gorst, Washington
  8. 1.7 4 km NNW of Fall City, Washington
  9. 1.5 1 km SW of Duvall, Washington
  10. 2.1 3 km NNE of White Center, Washington
  11. 1.8 3 km WSW of Wilderness Rim, Washington
  12. 2.7 1 km NW of Redmond, Washington
  13. 2.2 3 km NE of Belfair, Washington
  14. 1.9 0 km E of East Renton Highlands, Washington
  15. 1.8 1 km WNW of Mirrormont, 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.