QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

3 km NW of Lake Marcel-Stillwater, Washington

· 22 km deep · released about 22 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 26 kmSnohomish County 41 kmKitsap County 53 kmIsland County 73 kmPierce County 75 kmSkagit County 88 kmMason County 100 kmChelan County 101 kmThurston County 109 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
22 km below the surface
Felt
no reports yet
Nearest
King County, 26 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2405 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 22 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 5.8 680,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 480,000× the energy of this one
  3. Around the size people start to feel M 3.0 43× the energy of this one
  4. This earthquake M 1.9 about 22 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 47.7102, -121.9485. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 26 km (16 mi) NNW of here earthquakes near King County
Snohomish County, WA 41 km (25 mi) SSW of here earthquakes near Snohomish County
Kitsap County, WA 53 km (33 mi) E of here earthquakes near Kitsap County
Island County, WA 73 km (46 mi) SE of here earthquakes near Island County
Pierce County, WA 75 km (47 mi) NNE of here earthquakes near Pierce County
Skagit County, WA 88 km (54 mi) S of here earthquakes near Skagit County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.9 4 km S of Monroe, Washington
  2. 2.0 2 km N of North Bend, Washington
  3. 2.0 2 km NE of Black Diamond, Washington
  4. 2.8 2 km S of Ravensdale, Washington
  5. 1.8 4 km ENE of Granite Falls, Washington
  6. 1.7 7 km ENE of Fall City, Washington
  7. 1.8 3 km ENE of Granite Falls, Washington
  8. 2.6 3 km WSW of Monroe, Washington
  9. 1.7 6 km NE of Mirrormont, Washington
  10. 1.5 3 km WSW of Wilderness Rim, Washington
  11. 1.5 2 km ENE of Granite Falls, Washington
  12. 2.0 2 km W of Union Hill-Novelty Hill, Washington
  13. 1.9 3 km N of White Center, Washington
  14. 2.1 Washington
  15. 1.8 2 km WSW of Shoreline, 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 10,000 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.