QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Washington

· 26 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 22 kmIsland County 46 kmSkagit County 74 kmWhatcom County 78 kmClallam County 94 kmSnohomish County 96 kmJefferson County 99 kmKitsap County 103 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
26 km below the surface
Felt
no reports yet
Nearest
San Juan County, 22 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1237 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 5.6 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 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 48.5607, -122.8138. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 22 km (14 mi) ENE of here earthquakes near San Juan County
Island County, WA 46 km (29 mi) NNW of here earthquakes near Island County
Skagit County, WA 74 km (46 mi) W of here earthquakes near Skagit County
Whatcom County, WA 78 km (49 mi) WSW of here earthquakes near Whatcom County
Clallam County, WA 94 km (58 mi) ENE of here earthquakes near Clallam County
Snohomish County, WA 96 km (60 mi) NW of here earthquakes near Snohomish County

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

Aftershocks so far

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

  1. 1.7 5 km WSW of Mount Vernon, Washington
  2. 2.1 7 km NW of Jamestown, Washington
  3. 2.4 4 km W of Mount Vernon, Washington
  4. 1.5 8 km WNW of Orcas, Washington
  5. 2.5 4 km ENE of Oak Bay, Canada
  6. 1.9 5 km WSW of Stanwood, Washington
  7. 1.5 10 km E of Orcas, Washington
  8. 4.5 2025 Orcas Island, Washington
  9. 3.7 16 km SSE of Victoria, Canada
  10. 1.8 17 km NNW of Jamestown, Washington
  11. 1.5 11 km NNW of Orcas, Washington
  12. 1.6 5 km N of Port Townsend, Washington
  13. 2.8 10 km WSW of Friday Harbor, Washington
  14. 1.9 3 km W of Mount Vernon, Washington
  15. 2.0 9 km W of Coupeville, 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.