QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

0 km S of Big Lake, Washington

· 18 km deep · released about 6.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Skagit County 33 kmIsland County 41 kmSnohomish County 52 kmWhatcom County 58 kmSan Juan County 65 kmKitsap County 89 kmKing County 105 kmJefferson County 116 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
18 km below the surface
Felt
no reports yet
Nearest
Skagit County, 33 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2035 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 6.6 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 2,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.6 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 48.3943, -122.2437. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Skagit County, WA 33 km (21 mi) WSW of here earthquakes near Skagit County
Island County, WA 41 km (26 mi) NE of here earthquakes near Island County
Snohomish County, WA 52 km (32 mi) NW of here earthquakes near Snohomish County
Whatcom County, WA 58 km (36 mi) SSW of here earthquakes near Whatcom County
San Juan County, WA 65 km (40 mi) E 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

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

  1. 2.1 7 km W of Lake Cavanaugh, Washington
  2. 1.5 1 km ENE of Granite Falls, Washington
  3. 1.7 1 km SE of Mount Vernon, Washington
  4. 1.7 2 km ENE of Granite Falls, Washington
  5. 1.5 2 km W of Big Lake, Washington
  6. 1.6 3 km NNW of La Conner, Washington
  7. 2.4 8 km N of Anacortes, Washington
  8. 3.0 2 km ESE of Big Lake, Washington
  9. 2.8 8 km NW of Verlot, Washington
  10. 1.7 1 km ENE of Granite Falls, Washington
  11. 1.8 1 km NE of Oak Harbor, Washington
  12. 1.8 8 km SW of Anacortes, Washington
  13. 2.1 1 km ESE of Burlington, Washington
  14. 1.5 2 km ENE of Granite Falls, Washington
  15. 1.7 2 km E of Lake Stevens, 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.