QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2ml

3 km NNW of Lake Marcel-Stillwater, Washington

· 26 km deep · released about 1,900 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 27 kmSnohomish County 39 kmKitsap County 54 kmIsland County 73 kmPierce County 76 kmSkagit County 86 kmChelan County 100 kmMason County 101 kmThurston County 110 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 3.2 (ml)
Depth
26 km below the surface
Felt
191 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
King County, 27 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2146 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 191 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,900 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 180,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,600× the energy of this one
  4. This earthquake M 3.2 about 1,900 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 2× 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 47.7212, -121.9388. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 27 km (17 mi) NNW of here earthquakes near King County
Snohomish County, WA 39 km (24 mi) SSW of here earthquakes near Snohomish County
Kitsap County, WA 54 km (34 mi) E of here earthquakes near Kitsap County
Island County, WA 73 km (45 mi) SE of here earthquakes near Island County
Pierce County, WA 76 km (47 mi) NNE of here earthquakes near Pierce County
Skagit County, WA 86 km (54 mi) S of here earthquakes near Skagit County

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

Aftershocks so far

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

  1. 1.8 2 km SW of Ravensdale, Washington
  2. 2.3 2 km SSW of Ravensdale, Washington
  3. 3.2 2 km S of Ravensdale, Washington
  4. 3.0 6 km ENE of Carnation, Washington
  5. 2.2 3 km ENE of Lake Marcel-Stillwater, Washington
  6. 1.6 3 km ENE of Echo Lake, Washington
  7. 2.9 4 km S of Monroe, Washington
  8. 2.0 2 km N of North Bend, Washington
  9. 2.0 2 km NE of Black Diamond, Washington
  10. 2.8 2 km S of Ravensdale, Washington
  11. 1.8 4 km ENE of Granite Falls, Washington
  12. 1.7 7 km ENE of Fall City, Washington
  13. 1.8 3 km ENE of Granite Falls, Washington
  14. 2.6 3 km WSW of Monroe, Washington
  15. 1.7 6 km NE 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2019-07-12 — it released about 120 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.