QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

6 km NE of Snoqualmie, Washington

· 9.3 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 11 kmSnohomish County 53 kmPierce County 65 kmKitsap County 66 kmChelan County 92 kmIsland County 93 kmKittitas County 97 kmSkagit County 102 kmThurston County 107 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
9.3 km below the surface
Felt
no reports yet
Nearest
King County, 11 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1741 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 11 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 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 47.5768, -121.7748. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 11 km (7 mi) NNE of here earthquakes near King County
Snohomish County, WA 53 km (33 mi) S of here earthquakes near Snohomish County
Pierce County, WA 65 km (40 mi) NNE of here earthquakes near Pierce County
Kitsap County, WA 66 km (41 mi) E of here earthquakes near Kitsap County
Chelan County, WA 92 km (57 mi) WSW of here earthquakes near Chelan County
Island County, WA 93 km (58 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

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

  1. 1.6 11 km ESE of Enumclaw, Washington
  2. 2.7 1 km NW of Maple Valley, Washington
  3. 1.8 1 km SSW of Three Lakes, Washington
  4. 1.7 6 km ESE of Tanner, Washington
  5. 1.8 1 km ESE of Union Hill-Novelty Hill, Washington
  6. 1.6 0 km NNE of Lake Marcel-Stillwater, Washington
  7. 1.6 Puget Sound region, Washington
  8. 1.6 0 km N of Lake Marcel-Stillwater, Washington
  9. 1.6 11 km W of Greenwater, Washington
  10. 2.3 3 km W of Hobart, Washington
  11. 2.8 2 km SW of Wilderness Rim, Washington
  12. 1.7 8 km ENE of Snoqualmie, Washington
  13. 1.7 Puget Sound region, Washington
  14. 1.6 2 km ESE of Wilderness Rim, Washington
  15. 1.5 12 km ESE of Riverbend, 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 21,000 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.