QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

3 km WSW of Wilderness Rim, Washington

· 20 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 6 kmPierce County 50 kmKitsap County 67 kmSnohomish County 69 kmKittitas County 92 kmThurston County 95 kmChelan County 101 kmIsland County 103 kmMason County 103 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 1.9 (ml)
Depth
20 km below the surface
Felt
7 reports · strongest reported intensity III
Nearest
King County, 6 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2493 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 7 people have reported feeling it to USGS.

How big was it?

This earthquake released about 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 730,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 520,000× the energy of this one
  3. Around the size people start to feel M 3.0 46× the energy of this one
  4. This earthquake M 1.9 about 21 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 47.4368, -121.8113. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 6 km (4 mi) SSE of here earthquakes near King County
Pierce County, WA 50 km (31 mi) NNE of here earthquakes near Pierce County
Kitsap County, WA 67 km (42 mi) ESE of here earthquakes near Kitsap County
Snohomish County, WA 69 km (43 mi) S of here earthquakes near Snohomish County
Kittitas County, WA 92 km (57 mi) WNW of here earthquakes near Kittitas County
Thurston County, WA 95 km (59 mi) NE of here earthquakes near Thurston 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. 2.4 2 km NE of Mirrormont, Washington
  2. 1.9 2 km SW of Sultan, Washington
  3. 1.9 7 km ENE of Fall City, Washington
  4. 1.8 2 km NE of Mirrormont, Washington
  5. 1.6 3 km NW of Snoqualmie Pass, Washington
  6. 1.5 2 km SSW of Carnation, Washington
  7. 1.8 1 km S of Snoqualmie, Washington
  8. 1.8 2 km S of Monroe, Washington
  9. 2.0 2 km SE of Duvall, Washington
  10. 1.8 2 km ENE of Maple Valley, Washington
  11. 1.6 4 km E of Cathcart, Washington
  12. 2.2 8 km E of Carnation, Washington
  13. 3.2 3 km NNW of Lake Marcel-Stillwater, Washington
  14. 2.0 0 km SE of Carbonado, Washington
  15. 1.5 1 km NNW of Maple Valley, 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.