QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

3 km WNW of Vashon, Washington

· 25 km deep · released about 8.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 23 kmKing County 51 kmMason County 51 kmPierce County 53 kmThurston County 63 kmIsland County 79 kmJefferson County 85 kmSnohomish County 87 kmLewis County 98 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 1.6 (ml)
Depth
25 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 23 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3273 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 8.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.7 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 47.4587, -122.5090. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 23 km (14 mi) SSE of here earthquakes near Kitsap County
King County, WA 51 km (32 mi) W of here earthquakes near King County
Mason County, WA 51 km (32 mi) ENE of here earthquakes near Mason County
Pierce County, WA 53 km (33 mi) NNW of here earthquakes near Pierce County
Thurston County, WA 63 km (39 mi) NNE of here earthquakes near Thurston County
Island County, WA 79 km (49 mi) S of here earthquakes near Island County

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

Aftershocks so far

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

  1. 2.7 2 km NNE of Gorst, Washington
  2. 2.2 5 km S of Seabeck, Washington
  3. 1.9 6 km WSW of Chico, Washington
  4. 1.6 2 km N of Seattle, Washington
  5. 1.5 7 km ENE of Allyn, Washington
  6. 1.6 1 km W of Enetai, Washington
  7. 1.7 3 km W of Redmond, Washington
  8. 1.6 3 km W of Redmond, Washington
  9. 1.7 6 km W of Burley, Washington
  10. 1.6 2 km S of West Lake Sammamish, Washington
  11. 2.7 4 km WSW of Mercer Island, Washington
  12. 2.3 6 km W of Burley, Washington
  13. 1.8 1 km SSW of Esperance, Washington
  14. 1.9 5 km S of Port Ludlow, Washington
  15. 2.3 2 km WNW of Redmond, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.1 on 2017-02-23 — it released about 4,700 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.