QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

10 km ENE of Snoqualmie, Washington

· 12 km deep · released about 8.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 14 kmSnohomish County 54 kmPierce County 67 kmKitsap County 72 kmChelan County 87 kmKittitas County 92 kmIsland County 98 kmSkagit County 103 kmThurston County 111 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 1.6 (ml)
Depth
12 km below the surface
Felt
no reports yet
Nearest
King County, 14 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 370 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 8.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.4 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 47.5705, -121.6983. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 14 km (8 mi) NE of here earthquakes near King County
Snohomish County, WA 54 km (34 mi) S of here earthquakes near Snohomish County
Pierce County, WA 67 km (42 mi) NNE of here earthquakes near Pierce County
Kitsap County, WA 72 km (45 mi) E of here earthquakes near Kitsap County
Chelan County, WA 87 km (54 mi) WSW of here earthquakes near Chelan County
Kittitas County, WA 92 km (57 mi) WNW of here earthquakes near Kittitas 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. 2.1 4 km SW of Wilderness Rim, Washington
  2. 1.7 10 km ESE of Riverbend, Washington
  3. 2.1 4 km NNE of Snoqualmie, Washington
  4. 1.6 1 km NNE of Maple Valley, Washington
  5. 1.7 2 km NNE of May Creek, Washington
  6. 1.5 5 km SSW of Monroe, Washington
  7. 1.5 2 km WNW of Ames Lake, Washington
  8. 1.9 6 km SSE of Lea Hill, Washington
  9. 1.7 9 km SE of Enumclaw, Washington
  10. 2.2 10 km NNE of Startup, Washington
  11. 1.6 15 km ENE of Tanner, Washington
  12. 1.7 12 km ESE of Enumclaw, Washington
  13. 1.6 9 km S of Lake Morton-Berrydale, Washington
  14. 2.5 11 km E of Carnation, Washington
  15. 1.8 12 km NNE of Snoqualmie, 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 27,000 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.