QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

16 km NE of Cedar, Canada

· 15 km deep · released about 9.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 90 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 1.7 (ml)
Depth
15 km below the surface
Felt
no reports yet
Nearest
San Juan County, 90 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1556 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 9.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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 49.2187, -123.6805. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 90 km (56 mi) NNW of here earthquakes near San Juan County
Island County, WA 139 km (87 mi) NNW of here earthquakes near Island County

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

Aftershocks so far

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

  1. 1.8 3 km WNW of Ladysmith, Canada
  2. 1.6 1 km SE of Sechelt, Canada
  3. 1.8 7 km SE of Sechelt, Canada
  4. 1.9 4 km S of Sechelt, Canada
  5. 1.6 10 km NW of Ganges, Canada
  6. 1.6 3 km E of Sechelt, Canada
  7. 1.6 0 km SSE of Sechelt, Canada
  8. 2.3 8 km NNW of Bowen Island, Canada
  9. 2.8 20 km ENE of South Pender Harbour, Canada
  10. 2.0 8 km NW of Lake Cowichan, Canada
  11. 2.3 20 km SSW of East Wellington, Canada
  12. 2.4 13 km NE of Fairwinds, Canada
  13. 3.6 22 km NNE of Ganges, Canada
  14. 2.0 10 km NE of Saltair, Canada
  15. 1.6 11 km ENE of Salt Spring Island, 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.