QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

1 km NNE of Coupeville, Washington

· 56 km deep · released about 1.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 9 kmSan Juan County 43 kmKitsap County 66 kmSkagit County 70 kmSnohomish County 71 kmJefferson County 79 kmClallam County 91 kmWhatcom County 92 kmKing County 104 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 3.3 (ml)
Depth
56 km below the surface
Felt
193 reports · strongest reported intensity IV
Measured shaking
intensity II (ShakeMap)
Nearest
Island County, 9 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 574 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 193 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,600× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× 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 48.2352, -122.6815. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 9 km (5 mi) N of here earthquakes near Island County
San Juan County, WA 43 km (27 mi) SE of here earthquakes near San Juan County
Kitsap County, WA 66 km (41 mi) N of here earthquakes near Kitsap County
Skagit County, WA 70 km (44 mi) WSW of here earthquakes near Skagit County
Snohomish County, WA 71 km (44 mi) WNW of here earthquakes near Snohomish County
Jefferson County, WA 79 km (49 mi) NE of here earthquakes near Jefferson County

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

Aftershocks so far

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

  1. 1.5 5 km S of Port Ludlow, Washington
  2. 2.1 4 km WSW of Clinton, Washington
  3. 1.6 7 km NE of Quilcene, Washington
  4. 1.7 5 km W of Weallup Lake, Washington
  5. 1.9 5 km WSW of Stanwood, Washington
  6. 1.5 10 km E of Orcas, Washington
  7. 3.9 14 km SW of Blyn, Washington
  8. 4.5 2025 Orcas Island, Washington
  9. 1.8 17 km NNW of Jamestown, Washington
  10. 1.5 5 km ESE of Quilcene, Washington
  11. 1.8 4 km SSW of Port Ludlow, Washington
  12. 1.9 6 km SSW of River Road, Washington
  13. 1.7 2 km N of Bryant, Washington
  14. 2.3 7 km ESE of Quilcene, Washington
  15. 2.2 7 km E of Quilcene, 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 38 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.