QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

8 km ENE of Fall City, Washington

· 16 km deep · released about 800 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 13 kmSnohomish County 50 kmKitsap County 65 kmPierce County 67 kmIsland County 90 kmChelan County 92 kmKittitas County 99 kmSkagit County 99 kmMason County 108 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 3.0 (ml)
Depth
16 km below the surface
Felt
365 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
King County, 13 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2396 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 365 people have reported feeling it to USGS.

How big was it?

This earthquake released about 800 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 420,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 800 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 47.6017, -121.7877. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 13 km (8 mi) NNE of here earthquakes near King County
Snohomish County, WA 50 km (31 mi) S of here earthquakes near Snohomish County
Kitsap County, WA 65 km (40 mi) E of here earthquakes near Kitsap County
Pierce County, WA 67 km (42 mi) NNE of here earthquakes near Pierce County
Island County, WA 90 km (56 mi) SE of here earthquakes near Island County
Chelan County, WA 92 km (57 mi) WSW of here earthquakes near Chelan County

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

Aftershocks so far

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

  1. 1.5 12 km W of Greenwater, Washington
  2. 1.7 7 km ENE of Fall City, Washington
  3. 2.6 3 km WSW of Monroe, Washington
  4. 1.7 6 km NE of Mirrormont, Washington
  5. 1.5 3 km WSW of Wilderness Rim, Washington
  6. 2.0 2 km W of Union Hill-Novelty Hill, Washington
  7. 2.1 Washington
  8. 2.5 3 km W of Monroe, Washington
  9. 1.7 12 km W of Greenwater, Washington
  10. 1.8 5 km W of Wilderness Rim, Washington
  11. 1.6 3 km SSE of May Creek, Washington
  12. 2.7 11 km SW of Index, Washington
  13. 1.7 3 km SSW of Roosevelt, Washington
  14. 2.3 4 km NNW of Lakeland North, Washington
  15. 1.6 3 km ESE of Klahanie, 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 280 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.