QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

14 km S of Skykomish, Washington

· 9.1 km deep · released about 5.9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 35 kmSnohomish County 61 kmChelan County 65 kmKittitas County 73 kmPierce County 83 kmKitsap County 96 kmSkagit County 107 kmIsland County 116 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 1.5 (ml)
Depth
9.1 km below the surface
Felt
no reports yet
Nearest
King County, 35 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2447 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 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 47.5757, -121.3788. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 35 km (22 mi) ENE of here earthquakes near King County
Snohomish County, WA 61 km (38 mi) SSE of here earthquakes near Snohomish County
Chelan County, WA 65 km (40 mi) WSW of here earthquakes near Chelan County
Kittitas County, WA 73 km (45 mi) NW of here earthquakes near Kittitas County
Pierce County, WA 83 km (51 mi) NE of here earthquakes near Pierce County
Kitsap County, WA 96 km (59 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

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

  1. 2.2 2 km SSE of Carnation, Washington
  2. 1.9 13 km S of May Creek, Washington
  3. 1.5 1 km SSW of Carnation, Washington
  4. 1.6 4 km SSW of May Creek, Washington
  5. 1.5 3 km NE of Fall City, Washington
  6. 2.4 11 km E of Tanner, Washington
  7. 2.5 17 km E of Carnation, Washington
  8. 1.9 3 km NNW of Fall City, Washington
  9. 1.8 8 km E of Tanner, Washington
  10. 2.8 11 km E of Tanner, Washington
  11. 1.9 11 km SE of Riverbend, Washington
  12. 2.2 12 km ESE of Riverbend, Washington
  13. 1.9 3 km SSE of Sultan, Washington
  14. 2.1 11 km NNE of Tanner, Washington
  15. 1.6 7 km NE of Tanner, 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.