QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4ml

13 km E of Lake Marcel-Stillwater, Washington

· 19 km deep · released about 1.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 22 kmSnohomish County 42 kmKitsap County 69 kmPierce County 76 kmChelan County 86 kmIsland County 88 kmSkagit County 91 kmKittitas County 100 kmMason County 114 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 3.4 (ml)
Depth
19 km below the surface
Felt
349 reports · strongest reported intensity V
Measured shaking
intensity III (ShakeMap)
Nearest
King County, 22 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 605 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 349 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 95,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,300× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,000× the energy of this one
  4. This earthquake M 3.4 about 1.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.7× 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 47.6745, -121.7322. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 22 km (14 mi) NNE of here earthquakes near King County
Snohomish County, WA 42 km (26 mi) S of here earthquakes near Snohomish County
Kitsap County, WA 69 km (43 mi) E of here earthquakes near Kitsap County
Pierce County, WA 76 km (47 mi) NNE of here earthquakes near Pierce County
Chelan County, WA 86 km (53 mi) WSW of here earthquakes near Chelan County
Island County, WA 88 km (55 mi) SE of here earthquakes near Island 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. 2.1 7 km ENE of Fall City, Washington
  2. 1.7 7 km NE of Fall City, Washington
  3. 2.3 1 km SW of West Lake Stevens, Washington
  4. 1.6 7 km NE of Fall City, Washington
  5. 1.6 2 km NE of Granite Falls, Washington
  6. 1.9 7 km ENE of Fall City, Washington
  7. 2.8 8 km ENE of Fall City, Washington
  8. 2.1 7 km ENE of Fall City, Washington
  9. 3.5 9 km NE of Snoqualmie, Washington
  10. 1.8 7 km NE of Fall City, Washington
  11. 1.8 7 km ENE of Lake Roesiger, Washington
  12. 1.5 5 km E of Carnation, Washington
  13. 1.6 1 km NE of Mill Creek, Washington
  14. 1.9 3 km ESE of Lake Roesiger, Washington
  15. 2.2 3 km SW of Roosevelt, 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 63 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.