QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

1 km WNW of Lake Cavanaugh, Washington

· 9.5 km deep · released about 9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Skagit County 25 kmSnohomish County 37 kmIsland County 50 kmWhatcom County 59 kmSan Juan County 80 kmKitsap County 89 kmKing County 95 kmChelan County 118 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 1.6 (ml)
Depth
9.5 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Skagit County, 25 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1860 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 9 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 48.3298, -122.0473. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Skagit County, WA 25 km (16 mi) SW of here earthquakes near Skagit County
Snohomish County, WA 37 km (23 mi) NW of here earthquakes near Snohomish County
Island County, WA 50 km (31 mi) ENE of here earthquakes near Island County
Whatcom County, WA 59 km (37 mi) SSW of here earthquakes near Whatcom County
San Juan County, WA 80 km (50 mi) ESE of here earthquakes near San Juan County
Kitsap County, WA 89 km (55 mi) NNE of here earthquakes near Kitsap County

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

Aftershocks so far

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

  1. 1.7 2 km ENE of Swede Heaven, Washington
  2. 2.6 3 km NNW of Sedro-Woolley, Washington
  3. 1.7 13 km S of Concrete, Washington
  4. 2.0 7 km ENE of Oso, Washington
  5. 1.5 5 km ENE of Oso, Washington
  6. 1.9 4 km E of Granite Falls, Washington
  7. 3.0 5 km ENE of Oso, Washington
  8. 2.3 3 km SSW of Silvana, Washington
  9. 2.4 4 km ENE of Camano, Washington
  10. 1.5 4 km ENE of Oso, Washington
  11. 2.2 7 km ENE of Oso, Washington
  12. 1.5 4 km NE of Oso, Washington
  13. 1.8 5 km ENE of Oso, Washington
  14. 3.4 6 km ENE of Oso, Washington
  15. 2.1 6 km NNW of La Conner, 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.