QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

1 km SSW of Ravensdale, Washington

· 19 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 21 kmPierce County 34 kmKitsap County 60 kmThurston County 77 kmSnohomish County 82 kmLewis County 89 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 1.5 (ml)
Depth
19 km below the surface
Felt
no reports yet
Nearest
King County, 21 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1768 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 5.6 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 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 47.3358, -121.9917. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 21 km (13 mi) SW of here earthquakes near King County
Pierce County, WA 34 km (21 mi) NNE of here earthquakes near Pierce County
Kitsap County, WA 60 km (37 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 89 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. 1.6 4 km ENE of Lake Marcel-Stillwater, Washington
  2. 1.5 3 km WSW of North Bend, Washington
  3. 1.9 1 km WNW of Bonney Lake, Washington
  4. 1.5 3 km ENE of Lake Marcel-Stillwater, Washington
  5. 1.5 Puget Sound region, Washington
  6. 1.6 2 km E of Kapowsin, Washington
  7. 2.2 7 km WSW of Seattle, Washington
  8. 1.9 3 km NNE of White Center, Washington
  9. 1.6 11 km NE of North Bend, Washington
  10. 1.7 5 km S of Black Diamond, Washington
  11. 1.7 1 km WNW of Bonney Lake, Washington
  12. 2.7 4 km E of Lake Marcel-Stillwater, Washington
  13. 2.4 1 km SE of Manchester, Washington
  14. 2.3 3 km WNW of Duvall, Washington
  15. 1.6 6 km ENE of Mirrormont, 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.