QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

11 km NE of Snoqualmie, Washington

· 13 km deep · released about 18 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 15 kmSnohomish County 50 kmKitsap County 69 kmPierce County 69 kmChelan County 88 kmIsland County 93 kmKittitas County 96 kmSkagit County 99 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 1.9 (ml)
Depth
13 km below the surface
Felt
no reports yet
Nearest
King County, 15 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 747 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 18 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 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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 47.6080, -121.7368. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 15 km (9 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 69 km (43 mi) E of here earthquakes near Kitsap County
Pierce County, WA 69 km (43 mi) NNE of here earthquakes near Pierce County
Chelan County, WA 88 km (55 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

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

  1. 1.7 7 km NNE of May Creek, Washington
  2. 1.7 2 km NE of Echo Lake, Washington
  3. 2.8 4 km N of Echo Lake, Washington
  4. 1.8 1 km NNW of Maple Valley, Washington
  5. 1.8 8 km NE of Fall City, Washington
  6. 2.4 10 km NNE of Snoqualmie, Washington
  7. 1.7 9 km ENE of Snoqualmie, Washington
  8. 1.7 13 km W of Greenwater, Washington
  9. 2.4 2 km N of City of Sammamish, Washington
  10. 1.6 3 km SSW of Monroe, Washington
  11. 1.7 0 km NNW of Redmond, Washington
  12. 1.7 3 km WSW of Wilderness Rim, Washington
  13. 2.2 7 km ENE of Hobart, Washington
  14. 1.8 2 km SSE of Woodinville, Washington
  15. 2.1 7 km ENE of Fall City, 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 12,000 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.