QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

12 km W of Coupeville, Washington

· 51 km deep · released about 380 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 16 kmSan Juan County 37 kmKitsap County 67 kmJefferson County 68 kmClallam County 77 kmSkagit County 83 kmSnohomish County 83 kmMason County 100 kmWhatcom County 102 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
51 km below the surface
Felt
3 reports · strongest reported intensity III
Measured shaking
intensity II (ShakeMap)
Nearest
Island County, 16 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1512 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 380 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 40,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 29,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.5× the energy of this one
  4. This earthquake M 2.7 about 380 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 48.2215, -122.8592. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 16 km (10 mi) WNW of here earthquakes near Island County
San Juan County, WA 37 km (23 mi) SSE of here earthquakes near San Juan County
Kitsap County, WA 67 km (41 mi) NNW of here earthquakes near Kitsap County
Jefferson County, WA 68 km (42 mi) NE of here earthquakes near Jefferson County
Clallam County, WA 77 km (48 mi) E of here earthquakes near Clallam County
Skagit County, WA 83 km (51 mi) WSW of here earthquakes near Skagit County

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

Aftershocks so far

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

  1. 1.8 7 km ESE of Quilcene, Washington
  2. 2.8 8 km WNW of Carlsborg, WA
  3. 2.2 6 km NNE of Oak Bay, Canada
  4. 1.7 6 km W of Lofall, Washington
  5. 1.9 3 km SSE of Port Ludlow, Washington
  6. 1.6 2 km N of Port Townsend, Washington
  7. 2.3 15 km SW of River Road, Washington
  8. 2.1 10 km NNE of Quilcene, Washington
  9. 2.1 5 km SW of Clinton, Washington
  10. 1.9 6 km SE of Coupeville, Washington
  11. 1.8 4 km SW of Clinton, Washington
  12. 1.5 6 km W of Camano, Washington
  13. 1.7 13 km W of Ault Field, Washington
  14. 1.9 4 km ESE of Camano, Washington
  15. 2.9 7 km NW of La Conner, 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.