QuakeIndex

Earthquake · reviewed by a seismologist

M 4.6ml

2 km S of Roosevelt, Washington

· 29 km deep · released about 110 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Snohomish County 28 kmKing County 45 kmKitsap County 54 kmIsland County 58 kmSkagit County 71 kmPierce County 92 kmChelan County 104 kmMason County 104 kmSan Juan County 107 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 4.6 (ml)
Depth
29 km below the surface
Felt
11682 reports · strongest reported intensity V
Measured shaking
intensity V (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Snohomish County, 28 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 216 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 11682 people have reported feeling it to USGS.

How big was it?

This earthquake released about 110 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 1,500× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 68× the energy of this one
  3. Magna, Utah 2020 M 5.7 48× the energy of this one
  4. This earthquake M 4.6 about 110 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 230× more

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 47.8728, -122.0163. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Snohomish County, WA 28 km (17 mi) SW of here earthquakes near Snohomish County
King County, WA 45 km (28 mi) NNW of here earthquakes near King County
Kitsap County, WA 54 km (34 mi) ENE of here earthquakes near Kitsap County
Island County, WA 58 km (36 mi) ESE of here earthquakes near Island County
Skagit County, WA 71 km (44 mi) SSW of here earthquakes near Skagit County
Pierce County, WA 92 km (57 mi) N of here earthquakes near Pierce 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. 1.7 6 km NE of Fall City, Washington
  2. 3.0 8 km ENE of Fall City, Washington
  3. 1.7 6 km NE of Fall City, Washington
  4. 3.4 9 km NNE of Snoqualmie, Washington
  5. 1.6 2 km E of Snohomish, Washington
  6. 1.9 3 km ENE of Granite Falls, Washington
  7. 1.8 5 km WSW of Darrington, Washington
  8. 2.7 0 km WSW of Klahanie, Washington
  9. 1.6 8 km S of Baring, Washington
  10. 1.8 1 km E of Snoqualmie, Washington
  11. 1.7 2 km ESE of Lake Marcel-Stillwater, Washington
  12. 1.8 6 km WSW of Clinton, Washington
  13. 2.6 6 km WSW of Clinton, Washington
  14. 2.2 8 km SW of Warm Beach, Washington
  15. 2.6 1 km NE of Lake Marcel-Stillwater, 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.