QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

8 km NE of Bainbridge Island, Washington

· 30 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 16 kmKing County 50 kmIsland County 56 kmSnohomish County 66 kmMason County 66 kmPierce County 73 kmJefferson County 82 kmThurston County 87 kmSkagit County 102 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 1.8 (ml)
Depth
30 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 16 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3315 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 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 47.6773, -122.4420. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 16 km (10 mi) ENE of here earthquakes near Kitsap County
King County, WA 50 km (31 mi) WNW of here earthquakes near King County
Island County, WA 56 km (35 mi) SSE of here earthquakes near Island County
Snohomish County, WA 66 km (41 mi) SW of here earthquakes near Snohomish County
Mason County, WA 66 km (41 mi) ENE of here earthquakes near Mason County
Pierce County, WA 73 km (45 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

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

  1. 2.3 2 km WNW of Redmond, Washington
  2. 1.7 2 km N of Mercer Island, Washington
  3. 1.6 1 km NE of Maple Valley, Washington
  4. 1.6 1 km WNW of Maple Valley, Washington
  5. 2.5 0 km S of Esperance, Washington
  6. 1.9 7 km SSW of Clinton, Washington
  7. 1.6 1 km S of Lake Marcel-Stillwater, Washington
  8. 1.5 4 km SSE of Vashon, Washington
  9. 1.9 5 km NW of Freeland, Washington
  10. 1.7 3 km SSW of Erlands Point-Kitsap Lake, Washington
  11. 1.6 2 km WNW of Navy Yard City, Washington
  12. 1.6 2 km WNW of Navy Yard City, Washington
  13. 1.9 1 km NE of Suquamish, Washington
  14. 1.9 1 km NW of Maple Valley, Washington
  15. 1.6 2 km E 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.

On USGS

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