QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

1 km SW of West Lake Stevens, Washington

· 24 km deep · released about 88 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Snohomish County 27 kmIsland County 46 kmKitsap County 55 kmKing County 58 kmSkagit County 61 kmSan Juan County 94 kmWhatcom County 98 kmPierce County 103 kmMason 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 2.3 (ml)
Depth
24 km below the surface
Felt
no reports yet
Nearest
Snohomish County, 27 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 609 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 88 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 88 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 47.9807, -122.1155. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Snohomish County, WA 27 km (17 mi) WSW of here earthquakes near Snohomish County
Island County, WA 46 km (28 mi) ESE of here earthquakes near Island County
Kitsap County, WA 55 km (34 mi) NE of here earthquakes near Kitsap County
King County, WA 58 km (36 mi) NNW of here earthquakes near King County
Skagit County, WA 61 km (38 mi) SSW of here earthquakes near Skagit County
San Juan County, WA 94 km (58 mi) SE of here earthquakes near San Juan County

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

Aftershocks so far

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

  1. 1.5 3 km E of Granite Falls, Washington
  2. 2.1 8 km E of Port Townsend, Washington
  3. 2.5 6 km SE of Coupeville, Washington
  4. 1.5 2 km ENE of Woods Creek, Washington
  5. 1.9 7 km S of Woods Creek, Washington
  6. 1.8 7 km SW of Swede Heaven, Washington
  7. 2.0 3 km SSE of Port Ludlow, Washington
  8. 1.8 2 km NNE of Keyport, Washington
  9. 2.0 1 km ENE of Granite Falls, Washington
  10. 1.8 4 km WSW of Clinton, Washington
  11. 1.7 7 km NNE of May Creek, Washington
  12. 1.7 2 km NE of Echo Lake, Washington
  13. 2.8 4 km N of Echo Lake, Washington
  14. 2.1 0 km NNW of Esperance, Washington
  15. 1.6 2 km E of Granite Falls, 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 2,500 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.