QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

4 km E of Silvana, Washington

· 15 km deep · released about 67 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Snohomish County 36 kmIsland County 36 kmSkagit County 43 kmKitsap County 71 kmSan Juan County 76 kmWhatcom County 76 kmKing County 83 kmJefferson County 108 kmMason County 119 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 2.2 (ml)
Depth
15 km below the surface
Felt
9 reports · strongest reported intensity II
Nearest
Snohomish County, 36 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3128 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 9 people have reported feeling it to USGS.

How big was it?

This earthquake released about 67 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 230,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 160,000× the energy of this one
  3. Around the size people start to feel M 3.0 14× the energy of this one
  4. This earthquake M 2.2 about 67 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 48.1982, -122.1933. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Snohomish County, WA 36 km (22 mi) WNW of here earthquakes near Snohomish County
Island County, WA 36 km (22 mi) E of here earthquakes near Island County
Skagit County, WA 43 km (27 mi) SW of here earthquakes near Skagit County
Kitsap County, WA 71 km (44 mi) NNE of here earthquakes near Kitsap County
San Juan County, WA 76 km (47 mi) ESE of here earthquakes near San Juan County
Whatcom County, WA 76 km (47 mi) SSW of here earthquakes near Whatcom County

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

Aftershocks so far

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

  1. 1.9 6 km SE of Coupeville, Washington
  2. 1.8 4 km SW of Clinton, Washington
  3. 1.5 6 km W of Camano, Washington
  4. 2.3 2 km ENE of Granite Falls, Washington
  5. 1.6 2 km NE of Shoreline, Washington
  6. 1.9 4 km ESE of Camano, Washington
  7. 2.9 7 km NW of La Conner, Washington
  8. 1.9 2 km NE of Granite Falls, Washington
  9. 2.3 5 km ENE of Port Townsend, Washington
  10. 1.6 3 km NNW of Hamilton, Washington
  11. 1.9 6 km SSE of Port Ludlow, Washington
  12. 2.0 2 km ENE of Granite Falls, Washington
  13. 1.9 1 km WSW of Freeland, Washington
  14. 2.0 2 km NE of Granite Falls, Washington
  15. 1.6 6 km NE of Port Townsend, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.