QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

10 km NW of Friday Harbor, Washington

· 14 km deep · released about 860 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 11 kmIsland County 59 kmClallam County 80 kmJefferson County 94 kmSkagit County 96 kmWhatcom County 97 kmKitsap County 113 kmSnohomish County 117 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 3.0 (ml)
Depth
14 km below the surface
Felt
148 reports · strongest reported intensity V
Measured shaking
intensity III (ShakeMap)
Nearest
San Juan County, 11 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2165 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 148 people have reported feeling it to USGS.

How big was it?

This earthquake released about 860 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 390,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 18,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 12,000× the energy of this one
  4. This earthquake M 3.0 about 860 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 48.6070, -123.1090. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 11 km (7 mi) N of here earthquakes near San Juan County
Island County, WA 59 km (37 mi) NNW of here earthquakes near Island County
Clallam County, WA 80 km (50 mi) NE of here earthquakes near Clallam County
Jefferson County, WA 94 km (59 mi) NNE of here earthquakes near Jefferson County
Skagit County, WA 96 km (60 mi) W of here earthquakes near Skagit County
Whatcom County, WA 97 km (60 mi) WSW of here earthquakes near Whatcom County

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

Aftershocks so far

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

  1. 1.5 9 km WNW of Orcas, Washington
  2. 1.8 8 km WNW of Orcas, Washington
  3. 2.3 12 km ENE of Ganges, Canada
  4. 1.6 9 km E of Ganges, Canada
  5. 3.7 12 km ENE of Ganges, Canada
  6. 2.4 8 km N of Anacortes, Washington
  7. 1.8 8 km WNW of Orcas, Washington
  8. 1.7 8 km WNW of Orcas, Washington
  9. 1.7 11 km WNW of Coupeville, Washington
  10. 1.6 16 km NNW of Jamestown, Washington
  11. 1.8 1 km NE of Oak Harbor, Washington
  12. 1.8 8 km SW of Anacortes, Washington
  13. 2.5 13 km WNW of Ault Field, Washington
  14. 2.1 5 km NE of Six Mile, Canada
  15. 2.0 4 km NE of Oak Bay, 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.