QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0ml

6 km W of Quilcene, Washington

· 52 km deep · released about 17 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 31 kmJefferson County 42 kmIsland County 43 kmMason County 55 kmClallam County 76 kmSan Juan County 77 kmKing County 92 kmSnohomish County 93 kmThurston County 99 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 4.0 (ml)
Depth
52 km below the surface
Felt
887 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
USGS impact alert
green
Nearest
Kitsap County, 31 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 571 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 887 people have reported feeling it to USGS.

How big was it?

This earthquake released about 17 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 9,800× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 440× the energy of this one
  3. Magna, Utah 2020 M 5.7 310× the energy of this one
  4. This earthquake M 4.0 about 17 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 36× 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 47.8197, -122.9600. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 31 km (19 mi) NW of here earthquakes near Kitsap County
Jefferson County, WA 42 km (26 mi) E of here earthquakes near Jefferson County
Island County, WA 43 km (27 mi) SSW of here earthquakes near Island County
Mason County, WA 55 km (34 mi) NNE of here earthquakes near Mason County
Clallam County, WA 76 km (47 mi) ESE of here earthquakes near Clallam County
San Juan County, WA 77 km (48 mi) S of here earthquakes near San Juan County

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

Aftershocks so far

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

  1. 1.8 4 km SSW of Port Ludlow, Washington
  2. 2.3 3 km WNW of Navy Yard City, Washington
  3. 1.6 7 km ESE of Quilcene, Washington
  4. 1.8 5 km NE of Kingston, Washington
  5. 1.9 4 km WNW of Gorst, Washington
  6. 2.0 9 km W of Coupeville, Washington
  7. 1.9 2 km E of Belfair, Washington
  8. 1.8 4 km NNW of Port Townsend, Washington
  9. 1.7 8 km SSW of Seabeck, Washington
  10. 1.8 3 km WNW of Gorst, Washington
  11. 2.7 1 km ENE of Enetai, Washington
  12. 1.9 1 km E of Enetai, Washington
  13. 1.6 4 km SW of Port Ludlow, Washington
  14. 2.6 1 km ENE of Enetai, Washington
  15. 2.4 1 km ENE of Enetai, 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 2.5 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.