QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

11 km ENE of North Saanich, Canada

· 17 km deep · released about 180 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 26 kmIsland County 76 kmClallam County 80 kmJefferson County 102 kmWhatcom County 107 kmSkagit County 110 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
17 km below the surface
Felt
8 reports · strongest reported intensity III
Nearest
San Juan County, 26 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2099 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 8 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 83,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 59,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.2× 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 48.7060, -123.2793. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 26 km (16 mi) NNW of here earthquakes near San Juan County
Island County, WA 76 km (47 mi) NW of here earthquakes near Island County
Clallam County, WA 80 km (50 mi) NE of here earthquakes near Clallam County
Jefferson County, WA 102 km (63 mi) N of here earthquakes near Jefferson County
Whatcom County, WA 107 km (66 mi) W of here earthquakes near Whatcom County
Skagit County, WA 110 km (68 mi) WNW of here earthquakes near Skagit County

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

Aftershocks so far

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

  1. 1.7 8 km WNW of Friday Harbor, Washington
  2. 2.6 21 km S of Friday Harbor, Washington
  3. 1.6 7 km S of Saanichton, Canada
  4. 1.6 4 km SSW of Esquimalt, Canada
  5. 2.2 3 km NW of Victoria, Canada
  6. 1.5 Washington
  7. 1.9 10 km N of Sooke, Canada
  8. 1.6 8 km WNW of Friday Harbor, Washington
  9. 1.8 9 km NW of Friday Harbor, Washington
  10. 2.0 10 km E of Oak Bay, Canada
  11. 2.6 Washington-British Columbia border region
  12. 2.3 6 km WNW of Orcas, Washington
  13. 1.6 6 km W of Orcas, Washington
  14. 2.7 6 km WNW of Orcas, Washington
  15. 2.1 7 km SSW of Birch Bay, 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.