QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

5 km ENE of Anacortes, Washington

· 18 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 41 kmIsland County 42 kmSkagit County 54 kmWhatcom County 63 kmSnohomish County 78 kmKitsap County 99 kmJefferson County 108 kmClallam County 110 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 1.7 (ml)
Depth
18 km below the surface
Felt
no reports yet
Nearest
San Juan County, 41 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2588 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 48.5235, -122.5440. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 41 km (26 mi) E of here earthquakes near San Juan County
Island County, WA 42 km (26 mi) NNE of here earthquakes near Island County
Skagit County, WA 54 km (33 mi) W of here earthquakes near Skagit County
Whatcom County, WA 63 km (39 mi) SW of here earthquakes near Whatcom County
Snohomish County, WA 78 km (48 mi) NW of here earthquakes near Snohomish County
Kitsap County, WA 99 km (61 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. 2.3 1 km W of Oak Harbor, Washington
  2. 1.5 5 km WSW of Acme, Washington
  3. 1.6 0 km S of Big Lake, Washington
  4. 1.7 3 km WSW of Lake Cavanaugh, Washington
  5. 1.9 7 km ENE of Port Townsend, Washington
  6. 2.0 6 km SE of Bay View, Washington
  7. 2.2 5 km NE of Oak Harbor, Washington
  8. 1.8 6 km WNW of Coupeville, Washington
  9. 1.7 8 km NNW of Friday Harbor, Washington
  10. 2.1 5 km SW of Everson, Washington
  11. 1.7 5 km NNE of Anacortes, Washington
  12. 2.3 5 km N of Anacortes, Washington
  13. 2.5 5 km N of Anacortes, WA
  14. 1.6 7 km ESE of Nooksack, Washington
  15. 1.9 4 km W of Mount Vernon, 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.