QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

7 km N of Quilcene, Washington

· 54 km deep · released about 1.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 33 kmIsland County 34 kmJefferson County 48 kmMason County 63 kmSan Juan County 71 kmClallam County 78 kmSnohomish County 86 kmKing County 91 kmSkagit 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
54 km below the surface
Felt
40 reports · strongest reported intensity III
Measured shaking
intensity II (ShakeMap)
Nearest
Kitsap County, 33 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3190 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 40 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.1 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 6.7 150,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,700× the energy of this one
  4. This earthquake M 3.3 about 1.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.4× 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 47.8878, -122.8935. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 33 km (21 mi) NNW of here earthquakes near Kitsap County
Island County, WA 34 km (21 mi) SSW of here earthquakes near Island County
Jefferson County, WA 48 km (30 mi) E of here earthquakes near Jefferson County
Mason County, WA 63 km (39 mi) NNE of here earthquakes near Mason County
San Juan County, WA 71 km (44 mi) SSE of here earthquakes near San Juan County
Clallam County, WA 78 km (49 mi) ESE of here earthquakes near Clallam County

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

Aftershocks so far

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

  1. 1.7 2 km NNE of Southworth, Washington
  2. 3.3 16 km NNE of Jamestown, Washington
  3. 1.6 6 km NE of Port Townsend, Washington
  4. 1.7 6 km NE of Port Townsend, Washington
  5. 1.5 1 km SSE of Keyport, Washington
  6. 1.6 3 km SE of Gorst, Washington
  7. 2.3 1 km SE of Keyport, Washington
  8. 1.9 1 km ESE of Keyport, Washington
  9. 1.6 3 km NW of Suquamish, Washington
  10. 2.0 12 km WNW of Belfair, Washington
  11. 1.6 6 km NE of Lofall, Washington
  12. 1.9 5 km SSW of Port Ludlow, Washington
  13. 1.8 6 km NE of Port Townsend, Washington
  14. 1.9 29 km S of Port Angeles East, Washington
  15. 1.7 1 km WNW of Bangor Trident Base, 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 4.1 on 2017-02-23 — it released about 18 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.