QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

8 km N of Anacortes, Washington

· 13 km deep · released about 110 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 38 kmIsland County 48 kmSkagit County 59 kmWhatcom County 63 kmSnohomish County 86 kmKitsap County 106 kmClallam County 109 kmJefferson County 111 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 2.4 (ml)
Depth
13 km below the surface
Felt
16 reports · strongest reported intensity IV
Nearest
San Juan County, 38 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1702 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 16 people have reported feeling it to USGS.

How big was it?

This earthquake released about 110 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 140,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 99,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.8× the energy of this one
  4. This earthquake M 2.4 about 110 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 48.5923, -122.6060. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 38 km (24 mi) ENE of here earthquakes near San Juan County
Island County, WA 48 km (30 mi) N of here earthquakes near Island County
Skagit County, WA 59 km (37 mi) W of here earthquakes near Skagit County
Whatcom County, WA 63 km (39 mi) WSW of here earthquakes near Whatcom County
Snohomish County, WA 86 km (54 mi) NW of here earthquakes near Snohomish County
Kitsap County, WA 106 km (66 mi) N of here earthquakes near Kitsap County

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

Aftershocks so far

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

  1. 2.1 5 km SW of Aldergrove, Canada
  2. 1.7 5 km WSW of Aldergrove, Canada
  3. 1.6 9 km NNE of Sedro-Woolley, Washington
  4. 3.1 6 km N of Camano, Washington
  5. 1.8 4 km NNW of Bryant, Washington
  6. 1.5 Washington
  7. 1.6 8 km WNW of Friday Harbor, Washington
  8. 1.8 9 km NW of Friday Harbor, Washington
  9. 2.0 13 km W of Ault Field, Washington
  10. 1.8 2 km SW of Deming, Washington
  11. 1.9 4 km ENE of La Conner, Washington
  12. 2.3 6 km WNW of Orcas, Washington
  13. 1.6 6 km W of Orcas, Washington
  14. 2.7 6 km WNW of Orcas, Washington
  15. 2.1 7 km SSW of Birch Bay, 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.