QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

5 km WSW of Woodway, Washington

· 19 km deep · released about 5.9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 22 kmIsland County 46 kmKing County 55 kmSnohomish County 59 kmMason County 72 kmJefferson County 81 kmPierce County 83 kmSkagit County 93 kmSan Juan County 95 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
19 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 22 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3359 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 5.9 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 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 47.7718, -122.4393. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 22 km (13 mi) NE of here earthquakes near Kitsap County
Island County, WA 46 km (29 mi) SSE of here earthquakes near Island County
King County, WA 55 km (34 mi) NW of here earthquakes near King County
Snohomish County, WA 59 km (37 mi) WSW of here earthquakes near Snohomish County
Mason County, WA 72 km (45 mi) NE of here earthquakes near Mason County
Jefferson County, WA 81 km (51 mi) E of here earthquakes near Jefferson County

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

Aftershocks so far

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

  1. 1.7 1 km N of Lake Roesiger, Washington
  2. 1.6 3 km WSW of West Lake Stevens, Washington
  3. 1.8 4 km SE of Ames Lake, Washington
  4. 1.9 0 km SSE of Enetai, Washington
  5. 1.6 3 km NW of Burley, Washington
  6. 1.8 3 km NW of Cottage Lake, Washington
  7. 1.7 2 km WNW of Federal Way, Washington
  8. 1.5 3 km SSE of Quilcene, Washington
  9. 1.7 1 km NNE of Lynnwood, Washington
  10. 1.7 5 km ESE of Camano, Washington
  11. 2.1 5 km ESE of Indianola, Washington
  12. 1.5 3 km N of Union Hill-Novelty Hill, Washington
  13. 1.5 1 km N of White Center, Washington
  14. 2.2 2 km ENE of Enetai, Washington
  15. 1.6 5 km NNE of Dash Point, 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.