QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

42 km NE of Marblemount, Washington

· 3.8 km deep · released about 150 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Whatcom County 63 kmSkagit County 67 kmOkanogan County 94 kmSnohomish County 97 kmChelan County 103 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 2.5 (ml)
Depth
3.8 km below the surface
Felt
no reports yet
Nearest
Whatcom County, 63 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1170 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 150 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 99,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 70,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.2× the energy of this one
  4. This earthquake M 2.5 about 150 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 48.7517, -120.9857. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Whatcom County, WA 63 km (39 mi) E of here earthquakes near Whatcom County
Skagit County, WA 67 km (42 mi) ENE of here earthquakes near Skagit County
Okanogan County, WA 94 km (58 mi) WNW of here earthquakes near Okanogan County
Snohomish County, WA 97 km (60 mi) NE of here earthquakes near Snohomish County
Chelan County, WA 103 km (64 mi) NNW of here earthquakes near Chelan County
Douglas County, WA 147 km (92 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

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

  1. 1.7 1 km WNW of Marblemount, Washington
  2. 2.6 47 km SSW of Princeton, Canada
  3. 2.1 43 km ENE of Marblemount, Washington
  4. 2.1 52 km SSW of Princeton, Canada
  5. 2.1 16 km ENE of Marblemount, Washington
  6. 1.8 46 km ENE of Marblemount, Washington
  7. 1.7 56 km S of Princeton, Canada
  8. 1.7 14 km ENE of Marblemount, Washington
  9. 1.7 54 km S of Princeton, Canada
  10. 1.6 49 km SE of Hope, Canada
  11. 1.7 45 km NW of Winthrop, Washington
  12. 1.9 43 km S of Princeton, Canada
  13. 1.7 61 km SSW of Princeton, Canada
  14. 1.5 34 km ENE of Marblemount, Washington
  15. 1.6 44 km SE of Hope, Canada

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.