QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5ml

7 km SSW of River Road, Washington

· 44 km deep · released about 2.5 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Jefferson County 35 kmIsland County 41 kmClallam County 55 kmKitsap County 56 kmSan Juan County 56 kmMason County 73 kmSnohomish County 104 kmGrays Harbor County 111 kmSkagit County 114 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 3.5 (ml)
Depth
44 km below the surface
Felt
110 reports · strongest reported intensity IV
Measured shaking
intensity II (ShakeMap)
Nearest
Jefferson County, 35 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 912 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 110 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2.5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 68,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,100× the energy of this one
  4. This earthquake M 3.5 about 2.5 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.2× 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 48.0042, -123.1667. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Jefferson County, WA 35 km (22 mi) NE of here earthquakes near Jefferson County
Island County, WA 41 km (25 mi) WSW of here earthquakes near Island County
Clallam County, WA 55 km (34 mi) ESE of here earthquakes near Clallam County
Kitsap County, WA 56 km (35 mi) NW of here earthquakes near Kitsap County
San Juan County, WA 56 km (35 mi) S of here earthquakes near San Juan County
Mason County, WA 73 km (45 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

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

  1. 1.9 5 km NNE of Port Angeles, Washington
  2. 2.1 4 km WSW of Ault Field, Washington
  3. 2.1 7 km NW of Jamestown, Washington
  4. 2.1 2 km S of River Road, Washington
  5. 1.5 5 km S of Port Ludlow, Washington
  6. 1.6 7 km NE of Quilcene, Washington
  7. 3.9 14 km SW of Blyn, Washington
  8. 3.7 16 km SSE of Victoria, Canada
  9. 1.7 35 km W of Brinnon, Washington
  10. 1.8 17 km NNW of Jamestown, Washington
  11. 1.5 5 km ESE of Quilcene, Washington
  12. 1.8 4 km SSW of Port Ludlow, Washington
  13. 1.9 6 km SSW of River Road, Washington
  14. 1.5 16 km SW of Brinnon, Washington
  15. 2.3 7 km ESE 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 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.