QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

1 km NNW of Seattle, Washington

· 25 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 23 kmKing County 40 kmPierce County 64 kmSnohomish County 65 kmIsland County 65 kmMason County 69 kmThurston County 84 kmJefferson County 91 kmSkagit 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 1.5 (ml)
Depth
25 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 23 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 553 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 47.6150, -122.3388. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 23 km (15 mi) E of here earthquakes near Kitsap County
King County, WA 40 km (25 mi) WNW of here earthquakes near King County
Pierce County, WA 64 km (40 mi) NNW of here earthquakes near Pierce County
Snohomish County, WA 65 km (40 mi) SW of here earthquakes near Snohomish County
Island County, WA 65 km (41 mi) SSE of here earthquakes near Island County
Mason County, WA 69 km (43 mi) ENE of here earthquakes near Mason County

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

Aftershocks so far

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

  1. 1.5 2 km E of Enetai, Washington
  2. 2.0 0 km SE of Enetai, Washington
  3. 1.5 0 km E of Enetai, Washington
  4. 3.3 1 km S of Enetai, Washington
  5. 2.0 6 km SSE of Port Ludlow, Washington
  6. 1.8 3 km NNE of Klahanie, Washington
  7. 1.8 3 km NNE of East Renton Highlands, Washington
  8. 2.1 6 km N of Kingston, Washington
  9. 1.6 3 km SW of Seattle, Washington
  10. 1.5 6 km SW of Des Moines, Washington
  11. 1.8 6 km SW of Des Moines, Washington
  12. 1.5 3 km WNW of Wauna, Washington
  13. 1.8 3 km ESE of Indianola, Washington
  14. 2.6 1 km NW of Wauna, Washington
  15. 2.6 3 km SSE of Fircrest, 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.