QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

9 km NW of Friday Harbor, Washington

· 12 km deep · released about 150 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 11 kmIsland County 58 kmClallam County 80 kmJefferson County 94 kmSkagit County 95 kmWhatcom County 96 kmKitsap County 112 kmSnohomish County 115 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 2.5 (ml)
Depth
12 km below the surface
Felt
26 reports · strongest reported intensity III
Nearest
San Juan County, 11 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2079 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 26 people have reported feeling it to USGS.

How big was it?

This earthquake released about 150 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 72,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.5× the energy of this one
  4. This earthquake M 2.5 about 150 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 48.6027, -123.0918. 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 58 km (36 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 95 km (59 mi) W of here earthquakes near Skagit County
Whatcom County, WA 96 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. 1.6 5 km N of Oak Bay, Canada
  2. 2.3 5 km NNE of Oak Bay, Canada
  3. 1.6 8 km NE of Oak Bay, Canada
  4. 1.6 11 km E of North Saanich, Canada
  5. 1.7 9 km NW of Langford, Canada
  6. 1.6 9 km NW of Orcas, Washington
  7. 1.6 8 km NNW of Jamestown, Washington
  8. 1.5 16 km NE of Jamestown, Washington
  9. 1.7 2 km N of Metchosin, Canada
  10. 2.3 Washington-British Columbia border region
  11. 1.5 2 km NW of Orcas, Washington
  12. 2.0 6 km W of Orcas, Washington
  13. 1.6 5 km NNW of Victoria, Canada
  14. 1.5 10 km NNW of Anacortes, Washington
  15. 1.8 9 km WSW of Friday Harbor, 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.