QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2ml

55 km NE of Marblemount, Washington

· -0.1 km deep · released about 1,700 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Whatcom County 74 kmSkagit County 81 kmOkanogan County 84 kmChelan County 106 kmSnohomish 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 3.2 (ml)
Depth
-0.1 km below the surface
Felt
17 reports · strongest reported intensity II
Measured shaking
intensity III (ShakeMap)
Nearest
Whatcom County, 74 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1514 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 17 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 200,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,500× the energy of this one
  4. This earthquake M 3.2 about 1,700 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.7× more

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 48.8078, -120.8225. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Whatcom County, WA 74 km (46 mi) E of here earthquakes near Whatcom County
Skagit County, WA 81 km (50 mi) ENE of here earthquakes near Skagit County
Okanogan County, WA 84 km (52 mi) WNW of here earthquakes near Okanogan County
Chelan County, WA 106 km (66 mi) N of here earthquakes near Chelan County
Snohomish County, WA 109 km (68 mi) NE of here earthquakes near Snohomish County
Douglas County, WA 145 km (90 mi) NW of here earthquakes near Douglas County

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

Aftershocks so far

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

  1. 1.6 27 km NNW of Winthrop, Washington
  2. 1.6 26 km NNW of Winthrop, Washington
  3. 2.0 25 km NNW of Winthrop, Washington
  4. 2.6 47 km SSW of Princeton, Canada
  5. 2.1 43 km ENE of Marblemount, Washington
  6. 2.1 52 km SSW of Princeton, Canada
  7. 2.1 16 km ENE of Marblemount, Washington
  8. 1.8 46 km ENE of Marblemount, Washington
  9. 1.7 56 km S of Princeton, Canada
  10. 1.7 14 km ENE of Marblemount, Washington
  11. 1.7 54 km S of Princeton, Canada
  12. 1.6 49 km SE of Hope, Canada
  13. 1.7 45 km NW of Winthrop, Washington
  14. 1.9 43 km S of Princeton, Canada
  15. 1.8 24 km NNW of Winthrop, 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.