QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

11 km NW of Orcas, Washington

· 18 km deep · released about 91 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 19 kmIsland County 64 kmClallam County 88 kmWhatcom County 91 kmSkagit County 93 kmJefferson County 103 kmSnohomish County 117 kmKitsap County 119 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 2.3 (ml)
Depth
18 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
San Juan County, 19 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 911 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 91 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 10× the energy of this one
  4. This earthquake M 2.3 about 91 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 48.6730, -123.0462. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 19 km (12 mi) NNE of here earthquakes near San Juan County
Island County, WA 64 km (39 mi) NNW of here earthquakes near Island County
Clallam County, WA 88 km (55 mi) NE of here earthquakes near Clallam County
Whatcom County, WA 91 km (56 mi) WSW of here earthquakes near Whatcom County
Skagit County, WA 93 km (58 mi) WNW of here earthquakes near Skagit County
Jefferson County, WA 103 km (64 mi) NNE of here earthquakes near Jefferson 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. 1.8 8 km W of Ault Field, Washington
  2. 1.6 3 km N of Langford, Canada
  3. 1.8 10 km S of Victoria, Canada
  4. 1.6 10 km NW of Ganges, Canada
  5. 2.0 4 km WNW of Edison, Washington
  6. 1.8 9 km WNW of White Rock, Canada
  7. 2.3 5 km SSE of Esquimalt, Canada
  8. 2.7 10 km SE of Salt Spring Island, Canada
  9. 1.7 6 km SW of Saanichton, Canada
  10. 1.8 8 km SSW of Birch Bay, Washington
  11. 1.8 10 km S of Point Roberts, Washington
  12. 1.5 11 km WNW of Ault Field, Washington
  13. 1.9 14 km N of Jamestown, Washington
  14. 2.0 1 km SSW of North Saanich, Canada
  15. 1.7 6 km E of North Saanich, 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.