QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

10 km SE of Salt Spring Island, Canada

· 12 km deep · released about 340 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 35 kmClallam County 82 kmIsland County 85 kmJefferson County 107 kmWhatcom County 113 kmSkagit County 118 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 2.7 (ml)
Depth
12 km below the surface
Felt
105 reports · strongest reported intensity III
Nearest
San Juan County, 35 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 262 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 105 people have reported feeling it to USGS.

How big was it?

This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 48.7651, -123.3709. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 35 km (22 mi) NW of here earthquakes near San Juan County
Clallam County, WA 82 km (51 mi) NNE of here earthquakes near Clallam County
Island County, WA 85 km (53 mi) NW of here earthquakes near Island County
Jefferson County, WA 107 km (67 mi) N of here earthquakes near Jefferson County
Whatcom County, WA 113 km (70 mi) W of here earthquakes near Whatcom County
Skagit County, WA 118 km (73 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

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

  1. 1.8 3 km WNW of Ladysmith, Canada
  2. 1.7 14 km SW of Cowichan Bay, Canada
  3. 1.6 8 km WNW of Orcas, Washington
  4. 1.7 8 km WNW of Orcas, Washington
  5. 1.8 8 km WNW of Orcas, Washington
  6. 1.9 10 km S of Cowichan Bay, Canada
  7. 2.2 9 km SW of White Rock, Canada
  8. 2.2 5 km NW of Orcas, Washington
  9. 1.5 7 km WNW of Friday Harbor, Washington
  10. 1.9 10 km ESE of Salt Spring Island, Canada
  11. 1.6 3 km N of Langford, Canada
  12. 1.8 10 km S of Victoria, Canada
  13. 1.6 10 km NW of Ganges, Canada
  14. 1.8 9 km WNW of White Rock, Canada
  15. 2.3 5 km SSE of Esquimalt, 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.