QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

3 km ENE of Mirrormont, Washington

· 24 km deep · released about 800 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 10 kmPierce County 49 kmKitsap County 55 kmSnohomish County 66 kmThurston County 89 kmMason County 92 kmIsland County 93 kmKittitas County 104 kmLewis County 104 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 3.0 (ml)
Depth
24 km below the surface
Felt
55 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
King County, 10 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 553 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 55 people have reported feeling it to USGS.

How big was it?

This earthquake released about 800 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 420,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 800 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 47.4727, -121.9577. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 10 km (6 mi) WSW of here earthquakes near King County
Pierce County, WA 49 km (31 mi) NNE of here earthquakes near Pierce County
Kitsap County, WA 55 km (34 mi) ESE of here earthquakes near Kitsap County
Snohomish County, WA 66 km (41 mi) SSW of here earthquakes near Snohomish County
Thurston County, WA 89 km (55 mi) NE of here earthquakes near Thurston County
Mason County, WA 92 km (57 mi) E of here earthquakes near Mason County

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

Aftershocks so far

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

  1. 1.6 5 km NNE of Dash Point, Washington
  2. 1.7 3 km NE of Tanner, Washington
  3. 1.8 2 km WSW of Shoreline, Washington
  4. 2.4 5 km NNE of North Bend, Washington
  5. 2.2 4 km SE of Orting, Washington
  6. 1.5 1 km N of Carnation, Washington
  7. 1.6 0 km SSW of Beaux Arts Village, Washington
  8. 1.8 4 km WSW of Inglewood-Finn Hill, Washington
  9. 1.6 8 km ESE of Enumclaw, Washington
  10. 2.5 3 km ESE of Wilderness Rim, Washington
  11. 1.5 2 km ENE of Union Hill-Novelty Hill, Washington
  12. 1.6 1 km NE of Yarrow Point, Washington
  13. 1.8 8 km NE of Bainbridge Island, Washington
  14. 2.6 6 km WSW of Skykomish, Washington
  15. 1.6 2 km SE of Maltby, 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.