QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

10 km NNW of Anacortes, Washington

· 13 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 36 kmIsland County 50 kmSkagit County 62 kmWhatcom County 65 kmSnohomish County 89 kmClallam County 107 kmKitsap County 108 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 1.5 (ml)
Depth
13 km below the surface
Felt
no reports yet
Nearest
San Juan County, 36 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 566 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 48.6073, -122.6417. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 36 km (22 mi) ENE of here earthquakes near San Juan County
Island County, WA 50 km (31 mi) N of here earthquakes near Island County
Skagit County, WA 62 km (39 mi) WNW of here earthquakes near Skagit County
Whatcom County, WA 65 km (40 mi) WSW of here earthquakes near Whatcom County
Snohomish County, WA 89 km (55 mi) NW of here earthquakes near Snohomish County
Clallam County, WA 107 km (67 mi) ENE of here earthquakes near Clallam 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. 1.6 6 km W of Edison, Washington
  2. 1.6 10 km WSW of Friday Harbor, Washington
  3. 1.6 2 km SSW of Ferndale, Washington
  4. 1.8 2 km SSW of Ferndale, Washington
  5. 1.5 5 km W of Coupeville, Washington
  6. 1.8 2 km SW of Sedro-Woolley, Washington
  7. 2.3 11 km NW of Orcas, Washington
  8. 3.3 1 km NNE of Coupeville, Washington
  9. 1.5 3 km SSE of Stanwood, Washington
  10. 1.6 4 km NE of Bellingham, Washington
  11. 1.7 8 km E of Ferndale, Washington
  12. 3.4 2 km SSE of Stanwood, Washington
  13. 1.5 10 km NW of Friday Harbor, Washington
  14. 1.8 0 km SSE of Camano, Washington
  15. 1.5 5 km NNE of Lynden, 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.