QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

1 km S of Wilderness Rim, Washington

· 24 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 8 kmPierce County 52 kmSnohomish County 69 kmKitsap County 70 kmKittitas County 90 kmThurston County 98 kmChelan County 98 kmIsland County 105 kmLewis County 106 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 1.7 (ml)
Depth
24 km below the surface
Felt
no reports yet
Nearest
King County, 8 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 299 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 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 47.4380, -121.7708. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 8 km (5 mi) SE of here earthquakes near King County
Pierce County, WA 52 km (32 mi) NNE of here earthquakes near Pierce County
Snohomish County, WA 69 km (43 mi) S of here earthquakes near Snohomish County
Kitsap County, WA 70 km (43 mi) ESE of here earthquakes near Kitsap County
Kittitas County, WA 90 km (56 mi) WNW of here earthquakes near Kittitas County
Thurston County, WA 98 km (61 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

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

  1. 2.1 10 km ENE of Fall City, Washington
  2. 1.0 5 km WSW of Wilderness Rim, Washington
  3. 2.4 5 km SW of Wilderness Rim, Washington
  4. 1.1 2 km NW of Lake Marcel-Stillwater, Washington
  5. 0.8 4 km E of Carnation, Washington
  6. 2.0 3 km ESE of East Renton Highlands, Washington
  7. 0.5 2 km S of Union Hill-Novelty Hill, Washington
  8. 2.1 4 km SW of Wilderness Rim, Washington
  9. 1.7 10 km ESE of Riverbend, Washington
  10. 2.1 4 km NNE of Snoqualmie, Washington
  11. 1.6 1 km NNE of Maple Valley, Washington
  12. 1.7 2 km NNE of May Creek, Washington
  13. 1.5 5 km SSW of Monroe, Washington
  14. 1.5 2 km WNW of Ames Lake, Washington
  15. 1.9 6 km SSE of Lea Hill, 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.