QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7ml

16 km SSE of Victoria, Canada

· 40 km deep · released about 5 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 27 kmIsland County 47 kmClallam County 49 kmJefferson County 57 kmKitsap County 86 kmMason County 105 kmSkagit County 110 kmSnohomish County 115 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 3.7 (ml)
Depth
40 km below the surface
Felt
773 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
San Juan County, 27 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 454 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 773 people have reported feeling it to USGS.

How big was it?

This earthquake released about 5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 34,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,100× the energy of this one
  4. This earthquake M 3.7 about 5 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 10× more

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 48.2913, -123.2793. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 27 km (17 mi) SSW of here earthquakes near San Juan County
Island County, WA 47 km (29 mi) WNW of here earthquakes near Island County
Clallam County, WA 49 km (31 mi) ENE of here earthquakes near Clallam County
Jefferson County, WA 57 km (35 mi) NNE of here earthquakes near Jefferson County
Kitsap County, WA 86 km (54 mi) NNW of here earthquakes near Kitsap County
Mason County, WA 105 km (65 mi) N of here earthquakes near Mason County

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

Aftershocks so far

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

  1. 2.1 6 km ENE of Bell Hill, Washington
  2. 2.5 11 km SSW of River Road, Washington
  3. 1.9 14 km NNE of Port Angeles East, Washington
  4. 1.6 8 km WNW of Orcas, Washington
  5. 1.7 8 km WNW of Orcas, Washington
  6. 1.8 8 km WNW of Orcas, Washington
  7. 1.9 10 km S of Cowichan Bay, Canada
  8. 1.8 21 km S of Port Angeles East, Washington
  9. 2.2 5 km NW of Orcas, Washington
  10. 2.4 11 km S of Metchosin, Canada
  11. 1.7 2 km S of River Road, Washington
  12. 1.6 2 km W of Port Townsend, Washington
  13. 1.5 7 km WNW of Friday Harbor, Washington
  14. 2.7 12 km WSW of Anacortes, Washington
  15. 1.8 8 km W of Ault Field, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2023-10-09 — it released about 8.8 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.