QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

13 km SW of Duncan, Canada

· 41 km deep · released about 8.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 58 kmClallam County 65 kmJefferson County 102 kmIsland County 105 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 1.6 (ml)
Depth
41 km below the surface
Felt
no reports yet
Nearest
San Juan County, 58 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1379 days ago

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

How big was it?

This earthquake released about 8.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.4 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 48.6955, -123.8367. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 58 km (36 mi) WNW of here earthquakes near San Juan County
Clallam County, WA 65 km (40 mi) N of here earthquakes near Clallam County
Jefferson County, WA 102 km (63 mi) NNW of here earthquakes near Jefferson County
Island County, WA 105 km (65 mi) NW of here earthquakes near Island County
Kitsap County, WA 147 km (91 mi) NW of here earthquakes near Kitsap County

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

Aftershocks so far

32 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. 1.9 10 km S of Cowichan Bay, Canada
  4. 1.9 10 km ESE of Salt Spring Island, Canada
  5. 1.6 3 km N of Langford, Canada
  6. 1.6 10 km NW of Ganges, 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. 2.6 14 km SW of Cowichan Bay, Canada
  11. 2.1 8 km SW of Duncan, Canada
  12. 2.0 1 km SSW of North Saanich, Canada
  13. 1.7 6 km E of North Saanich, Canada
  14. 1.7 2 km NE of Six Mile, Canada
  15. 1.5 24 km SSW of Lake Cowichan, 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.