QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

3 km SW of Woodway, Washington

· 23 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 23 kmIsland County 47 kmKing County 54 kmSnohomish County 58 kmMason County 74 kmPierce County 83 kmJefferson County 83 kmSkagit County 92 kmSan Juan County 96 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 2.5 (ml)
Depth
23 km below the surface
Felt
21 reports · strongest reported intensity III
Measured shaking
intensity II (ShakeMap)
Nearest
Kitsap County, 23 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2186 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 21 people have reported feeling it to USGS.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 47.7725, -122.4152. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 23 km (14 mi) NE of here earthquakes near Kitsap County
Island County, WA 47 km (29 mi) SSE of here earthquakes near Island County
King County, WA 54 km (33 mi) NW of here earthquakes near King County
Snohomish County, WA 58 km (36 mi) WSW of here earthquakes near Snohomish County
Mason County, WA 74 km (46 mi) NE of here earthquakes near Mason County
Pierce County, WA 83 km (51 mi) NNW of here earthquakes near Pierce County

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

Aftershocks so far

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

  1. 1.9 4 km WSW of Lake Marcel-Stillwater, Washington
  2. 1.8 5 km SW of Port Ludlow, Washington
  3. 1.9 7 km ENE of Port Townsend, Washington
  4. 1.6 4 km W of Seabeck, Washington
  5. 2.2 3 km S of Duvall, Washington
  6. 1.7 2 km NE of Mirrormont, Washington
  7. 1.7 3 km ENE of Enetai, Washington
  8. 1.5 2 km NNW of Manchester, Washington
  9. 2.2 1 km E of Enetai, Washington
  10. 1.8 Puget Sound region, Washington
  11. 1.5 5 km W of Gorst, Washington
  12. 2.2 3 km ENE of Lake Marcel-Stillwater, Washington
  13. 1.6 3 km ENE of Echo Lake, Washington
  14. 2.9 4 km S of Monroe, Washington
  15. 2.4 0 km NE of Enetai, 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 4.6 on 2019-07-12 — it released about 1,300 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.