QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

8 km NE of Marietta-Alderwood, Washington

· 19 km deep · released about 56 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Whatcom County 46 kmSan Juan County 59 kmSkagit County 61 kmIsland County 77 kmSnohomish County 101 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
19 km below the surface
Felt
no reports yet
Nearest
Whatcom County, 46 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 565 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 56 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 5.8 270,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 190,000× the energy of this one
  3. Around the size people start to feel M 3.0 17× the energy of this one
  4. This earthquake M 2.2 about 56 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 48.8345, -122.4643. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Whatcom County, WA 46 km (29 mi) W of here earthquakes near Whatcom County
San Juan County, WA 59 km (37 mi) NE of here earthquakes near San Juan County
Skagit County, WA 61 km (38 mi) NW of here earthquakes near Skagit County
Island County, WA 77 km (48 mi) NNE of here earthquakes near Island County
Snohomish County, WA 101 km (63 mi) NNW of here earthquakes near Snohomish County
Clallam County, WA 132 km (82 mi) NE of here earthquakes near Clallam County

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

Aftershocks so far

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

  1. 2.0 10 km NNE of Hamilton, Washington
  2. 1.5 11 km ENE of Mission, Canada
  3. 1.8 2 km E of Peaceful Valley, Washington
  4. 2.6 15 km NNE of Lyman, Washington
  5. 1.6 10 km W of Marietta, Washington
  6. 1.8 10 km W of Marietta, Washington
  7. 1.9 6 km S of Acme, Washington
  8. 1.7 6 km NW of Glacier, Washington
  9. 1.9 14 km ESE of Acme, Washington
  10. 1.8 14 km NNE of Lyman, Washington
  11. 2.0 2 km WNW of Deming, Washington
  12. 1.5 4 km SSW of Marietta, Washington
  13. 1.6 5 km SSW of Anacortes, Washington
  14. 1.9 2 km S of Marietta-Alderwood, Washington
  15. 2.2 2 km S of Marietta-Alderwood, 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.