QuakeIndex

explosion · reviewed by a seismologist

M 1.7ml

8 km WNW of Friday Harbor, Washington

· -0.0 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 6 kmIsland County 56 kmClallam County 75 kmJefferson County 88 kmSkagit County 97 kmWhatcom County 100 kmKitsap County 108 kmSnohomish County 116 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 1.7 (ml)
Depth
-0.0 km below the surface
Felt
no reports yet
Nearest
San Juan County, 6 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 983 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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 48.5557, -123.1347. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 6 km (4 mi) NNW of here earthquakes near San Juan County
Island County, WA 56 km (35 mi) NW of here earthquakes near Island County
Clallam County, WA 75 km (46 mi) NE of here earthquakes near Clallam County
Jefferson County, WA 88 km (55 mi) NNE of here earthquakes near Jefferson County
Skagit County, WA 97 km (61 mi) W of here earthquakes near Skagit County
Whatcom County, WA 100 km (62 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

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

  1. 2.3 3 km SW of Oak Harbor, Washington
  2. 1.9 14 km N of Jamestown, Washington
  3. 2.0 1 km SSW of North Saanich, Canada
  4. 1.7 6 km E of North Saanich, Canada
  5. 1.5 5 km WSW of Ferndale, Washington
  6. 1.5 8 km WNW of La Conner, Washington
  7. 1.8 5 km SE of Oak Bay, Canada
  8. 1.8 5 km SW of Custer, Washington
  9. 1.9 5 km NNE of Port Angeles, Washington
  10. 1.7 2 km NE of Six Mile, Canada
  11. 2.1 4 km WSW of Ault Field, Washington
  12. 2.1 7 km NW of Jamestown, Washington
  13. 1.5 8 km WNW of Orcas, Washington
  14. 2.5 4 km ENE of Oak Bay, Canada
  15. 1.5 10 km E of Orcas, 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.