QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

2 km S of Ravensdale, Washington

· 20 km deep · released about 430 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 21 kmPierce County 33 kmKitsap County 61 kmThurston County 77 kmSnohomish County 82 kmLewis County 88 kmMason County 89 kmKittitas County 102 kmIsland County 105 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 2.8 (ml)
Depth
20 km below the surface
Felt
17 reports · strongest reported intensity III
Nearest
King County, 21 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2038 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 17 people have reported feeling it to USGS.

How big was it?

This earthquake released about 430 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 35,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 25,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.2× the energy of this one
  4. This earthquake M 2.8 about 430 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 47.3297, -121.9868. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 21 km (13 mi) SSW of here earthquakes near King County
Pierce County, WA 33 km (21 mi) NNE of here earthquakes near Pierce County
Kitsap County, WA 61 km (38 mi) SE of here earthquakes near Kitsap County
Thurston County, WA 77 km (48 mi) NE of here earthquakes near Thurston County
Snohomish County, WA 82 km (51 mi) SSW of here earthquakes near Snohomish County
Lewis County, WA 88 km (55 mi) NNE of here earthquakes near Lewis County

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

Aftershocks so far

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

  1. 2.2 1 km NNE of Carnation, Washington
  2. 1.8 12 km W of Greenwater, Washington
  3. 1.5 1 km N of Boulevard Park, Washington
  4. 1.9 2 km SE of Ravensdale, Washington
  5. 1.7 1 km WNW of Bonney Lake, Washington
  6. 1.6 0 km N of Boulevard Park, Washington
  7. 2.8 0 km S of Boulevard Park, Washington
  8. 2.1 0 km SSW of Boulevard Park, Washington
  9. 2.2 2 km SSE of Carnation, Washington
  10. 1.6 0 km WSW of Boulevard Park, Washington
  11. 1.9 13 km S of May Creek, Washington
  12. 1.6 0 km NW of Boulevard Park, Washington
  13. 1.5 1 km SSW of Carnation, Washington
  14. 1.5 13 km W of Greenwater, Washington
  15. 1.5 3 km NE of Fall City, 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.