QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

4 km SSE of Vashon, Washington

· 20 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 30 kmPierce County 45 kmKing County 45 kmMason County 57 kmThurston County 61 kmIsland County 85 kmSnohomish County 87 kmLewis County 93 kmJefferson County 93 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
20 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 30 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3144 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 47.4127, -122.4270. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 30 km (19 mi) SSE of here earthquakes near Kitsap County
Pierce County, WA 45 km (28 mi) NNW of here earthquakes near Pierce County
King County, WA 45 km (28 mi) W of here earthquakes near King County
Mason County, WA 57 km (35 mi) E of here earthquakes near Mason County
Thurston County, WA 61 km (38 mi) NNE of here earthquakes near Thurston County
Island County, WA 85 km (53 mi) SSE of here earthquakes near Island County

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

Aftershocks so far

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

  1. 1.7 2 km SSE of Manchester, Washington
  2. 1.6 2 km SE of Manchester, Washington
  3. 1.6 2 km NE of Shoreline, Washington
  4. 2.8 2 km NNW of Fircrest, Washington
  5. 1.7 1 km SE of Keyport, Washington
  6. 1.5 3 km SSE of Des Moines, Washington
  7. 1.8 3 km S of Suquamish, Washington
  8. 1.6 4 km NE of Bainbridge Island, Washington
  9. 1.5 2 km ESE of Manchester, Washington
  10. 1.9 3 km E of Indianola, Washington
  11. 1.9 1 km SE of Dash Point, Washington
  12. 2.0 1 km SE of Keyport, Washington
  13. 1.6 1 km ENE of Enetai, Washington
  14. 1.7 2 km NNE of Southworth, Washington
  15. 1.5 8 km SW of Grapeview, 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.