QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

15 km SSE of Friday Harbor, Washington

· 48 km deep · released about 52 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 18 kmIsland County 33 kmClallam County 79 kmJefferson County 81 kmSkagit County 82 kmKitsap County 88 kmWhatcom County 93 kmSnohomish County 94 kmMason County 119 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 2.2 (ml)
Depth
48 km below the surface
Felt
no reports yet
Nearest
San Juan County, 18 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 564 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 52 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 290,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 52 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 48.4098, -122.9157. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 18 km (11 mi) SE of here earthquakes near San Juan County
Island County, WA 33 km (21 mi) NNW of here earthquakes near Island County
Clallam County, WA 79 km (49 mi) ENE of here earthquakes near Clallam County
Jefferson County, WA 81 km (50 mi) NE of here earthquakes near Jefferson County
Skagit County, WA 82 km (51 mi) W of here earthquakes near Skagit County
Kitsap County, WA 88 km (55 mi) NNW of here earthquakes near Kitsap County

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

Aftershocks so far

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

  1. 2.8 6 km E of North Saanich, Canada
  2. 1.7 15 km NW of Orcas, Washington
  3. 1.6 6 km SW of Port Hadlock-Irondale, Washington
  4. 1.9 7 km ENE of Port Townsend, Washington
  5. 2.0 6 km SE of Bay View, Washington
  6. 2.2 5 km NE of Oak Harbor, Washington
  7. 1.8 6 km WNW of Coupeville, Washington
  8. 1.7 8 km NNW of Friday Harbor, Washington
  9. 1.7 5 km NNE of Anacortes, Washington
  10. 2.3 5 km N of Anacortes, Washington
  11. 3.0 6 km NE of Oak Bay, Canada
  12. 2.5 5 km N of Anacortes, WA
  13. 1.9 4 km W of Mount Vernon, Washington
  14. 1.9 6 km WSW of Mount Vernon, Washington
  15. 1.9 7 km NE of Marrowstone, 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.