QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

4 km WSW of Skykomish, Washington

· 10 km deep · released about 7.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 38 kmSnohomish County 49 kmChelan County 62 kmKittitas County 83 kmPierce County 90 kmKitsap County 93 kmSkagit County 95 kmIsland 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 1.6 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
King County, 38 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 340 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 7.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 7.8 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 47.6857, -121.4137. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 38 km (24 mi) NE of here earthquakes near King County
Snohomish County, WA 49 km (30 mi) SSE of here earthquakes near Snohomish County
Chelan County, WA 62 km (39 mi) WSW of here earthquakes near Chelan County
Kittitas County, WA 83 km (52 mi) NW of here earthquakes near Kittitas County
Pierce County, WA 90 km (56 mi) NE of here earthquakes near Pierce County
Kitsap County, WA 93 km (58 mi) E of here earthquakes near Kitsap County

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

Aftershocks so far

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

  1. 1.2 1 km NW of Lake Marcel-Stillwater, Washington
  2. 2.1 10 km ENE of Fall City, Washington
  3. 1.0 5 km WSW of Wilderness Rim, Washington
  4. 2.4 5 km SW of Wilderness Rim, Washington
  5. 1.1 2 km NW of Lake Marcel-Stillwater, Washington
  6. 0.8 4 km E of Carnation, Washington
  7. 2.1 4 km SW of Wilderness Rim, Washington
  8. 1.7 10 km ESE of Riverbend, Washington
  9. 2.1 4 km NNE of Snoqualmie, Washington
  10. 1.7 2 km NNE of May Creek, Washington
  11. 2.2 10 km NNE of Startup, Washington
  12. 1.6 15 km ENE of Tanner, Washington
  13. 2.5 11 km E of Carnation, Washington
  14. 1.8 12 km NNE of Snoqualmie, Washington
  15. 2.1 7 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.