QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

12 km SSE of Friday Harbor, Washington

· 6.8 km deep · released about 120 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 14 kmIsland County 37 kmClallam County 78 kmJefferson County 82 kmSkagit County 84 kmKitsap County 91 kmWhatcom County 94 kmSnohomish County 98 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
6.8 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
San Juan County, 14 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1514 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 120 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 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 92,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.2× the energy of this one
  4. This earthquake M 2.4 about 120 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 48.4327, -122.9565. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 14 km (8 mi) SE of here earthquakes near San Juan County
Island County, WA 37 km (23 mi) NW of here earthquakes near Island County
Clallam County, WA 78 km (48 mi) ENE of here earthquakes near Clallam County
Jefferson County, WA 82 km (51 mi) NNE of here earthquakes near Jefferson County
Skagit County, WA 84 km (52 mi) W of here earthquakes near Skagit County
Kitsap County, WA 91 km (57 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

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

  1. 1.5 5 km W of Coupeville, Washington
  2. 1.9 1 km NE of Six Mile, Canada
  3. 2.3 11 km NW of Orcas, Washington
  4. 3.3 1 km NNE of Coupeville, Washington
  5. 1.6 2 km ENE of Port Angeles East, Washington
  6. 4.3 Port Townsend, WA
  7. 2.2 Washington
  8. 1.5 10 km NW of Friday Harbor, Washington
  9. 1.8 0 km SSE of Camano, Washington
  10. 1.6 10 km ESE of Orcas, Washington
  11. 2.5 14 km W of Marietta, Washington
  12. 1.7 8 km WNW of Friday Harbor, Washington
  13. 2.6 21 km S of Friday Harbor, Washington
  14. 1.6 7 km S of Saanichton, Canada
  15. 1.6 4 km SSW of Esquimalt, Canada

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.