QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

6 km SW of Des Moines, Washington

· 18 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 36 kmPierce County 39 kmKing County 44 kmThurston County 59 kmMason County 59 kmLewis County 87 kmSnohomish County 90 kmIsland County 91 kmJefferson County 99 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
18 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Kitsap County, 36 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3489 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 17 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 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× the energy of this one
  4. This earthquake M 1.8 about 17 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 47.3665, -122.3855. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 36 km (23 mi) SSE of here earthquakes near Kitsap County
Pierce County, WA 39 km (24 mi) NNW of here earthquakes near Pierce County
King County, WA 44 km (27 mi) WSW of here earthquakes near King County
Thurston County, WA 59 km (36 mi) NE of here earthquakes near Thurston County
Mason County, WA 59 km (37 mi) E of here earthquakes near Mason County
Lewis County, WA 87 km (54 mi) N of here earthquakes near Lewis County

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

Aftershocks so far

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

  1. 1.6 0 km NNE of Mercer Island, Washington
  2. 1.8 1 km SSE of Mercer Island, Washington
  3. 1.9 1 km NE of Alderton, Washington
  4. 1.7 10 km NNW of Belfair, Washington
  5. 1.6 5 km N of Seattle, Washington
  6. 1.7 5 km SSE of Suquamish, Washington
  7. 1.9 2 km ENE of Enetai, Washington
  8. 2.0 0 km NNE of Enetai, Washington
  9. 1.6 0 km SW of Enetai, Washington
  10. 1.8 0 km WNW of Enetai, Washington
  11. 1.8 1 km SE of Enetai, Washington
  12. 2.8 1 km ESE of Enetai, Washington
  13. 1.6 0 km SE of Enetai, Washington
  14. 2.0 1 km SE of Enetai, Washington
  15. 1.5 1 km W of Seattle, 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.