QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

7 km SSE of Oak Bay, Canada

· 25 km deep · released about 180 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 17 kmIsland County 50 kmClallam County 57 kmJefferson County 68 kmKitsap County 95 kmSkagit County 106 kmWhatcom County 115 kmMason County 116 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 2.5 (ml)
Depth
25 km below the surface
Felt
2 reports · strongest reported intensity IV
Nearest
San Juan County, 17 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1546 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 180 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 86,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 61,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.4× the energy of this one
  4. This earthquake M 2.5 about 180 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 48.3920, -123.2460. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 17 km (10 mi) SW of here earthquakes near San Juan County
Island County, WA 50 km (31 mi) WNW of here earthquakes near Island County
Clallam County, WA 57 km (35 mi) ENE of here earthquakes near Clallam County
Jefferson County, WA 68 km (43 mi) NNE of here earthquakes near Jefferson County
Kitsap County, WA 95 km (59 mi) NNW of here earthquakes near Kitsap County
Skagit County, WA 106 km (66 mi) W of here earthquakes near Skagit County

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

Aftershocks so far

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

  1. 1.9 6 km NNE of Orcas, Washington
  2. 2.1 11 km E of North Saanich, Canada
  3. 1.5 11 km WNW of Ault Field, Washington
  4. 4.0 12 km E of Saanichton, Canada
  5. 1.6 1 km SE of Six Mile, Canada
  6. 2.0 13 km N of Sooke, Canada
  7. 2.2 12 km NW of Port Angeles, Washington
  8. 1.7 12 km WNW of Orcas, Washington
  9. 1.6 9 km NW of Friday Harbor, Washington
  10. 1.6 10 km SSE of Port Angeles East, Washington
  11. 1.6 6 km SSW of Saanichton, Canada
  12. 1.6 10 km WSW of Friday Harbor, Washington
  13. 2.8 3 km E of Port Townsend, Washington
  14. 1.5 5 km W of Coupeville, Washington
  15. 1.9 1 km NE of Six Mile, 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.