QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

4 km NE of Vashon, Washington

· 22 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 24 kmKing County 45 kmPierce County 52 kmMason County 58 kmThurston County 68 kmIsland County 78 kmSnohomish County 81 kmJefferson County 90 kmLewis County 100 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 2.1 (ml)
Depth
22 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 24 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 403 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 51 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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 47.4798, -122.4270. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 24 km (15 mi) SE of here earthquakes near Kitsap County
King County, WA 45 km (28 mi) W of here earthquakes near King County
Pierce County, WA 52 km (32 mi) NNW of here earthquakes near Pierce County
Mason County, WA 58 km (36 mi) ENE of here earthquakes near Mason County
Thurston County, WA 68 km (42 mi) NNE of here earthquakes near Thurston County
Island County, WA 78 km (48 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

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

  1. 1.8 1 km S of Shoreline, Washington
  2. 2.4 3 km ENE of Belfair, Washington
  3. 1.9 1 km WSW of Manchester, Washington
  4. 2.9 2 km W of Home, Washington
  5. 2.0 8 km W of Gorst, Washington
  6. 3.0 4 km ESE of Cathcart, Washington
  7. 1.9 0 km SE of Enetai, Washington
  8. 1.6 1 km E of Clyde Hill, Washington
  9. 1.5 5 km WSW of Erlands Point-Kitsap Lake, Washington
  10. 1.5 0 km ESE of Browns Point, Washington
  11. 2.1 5 km S of Gorst, Washington
  12. 1.7 11 km NW of Belfair, Washington
  13. 1.6 2 km E of Enetai, Washington
  14. 2.6 1 km ENE of Enetai, Washington
  15. 3.0 2 km NNW of Ames Lake, 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.