QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

4 km NE of Marrowstone, Washington

· 32 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 8 kmKitsap County 50 kmSan Juan County 57 kmSnohomish County 66 kmJefferson County 72 kmSkagit County 76 kmKing County 90 kmMason County 91 kmClallam County 92 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 1.5 (ml)
Depth
32 km below the surface
Felt
no reports yet
Nearest
Island County, 8 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3044 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 48.0898, -122.6518. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 8 km (5 mi) S of here earthquakes near Island County
Kitsap County, WA 50 km (31 mi) N of here earthquakes near Kitsap County
San Juan County, WA 57 km (36 mi) SE of here earthquakes near San Juan County
Snohomish County, WA 66 km (41 mi) W of here earthquakes near Snohomish County
Jefferson County, WA 72 km (45 mi) ENE of here earthquakes near Jefferson County
Skagit County, WA 76 km (47 mi) SW of here earthquakes near Skagit County

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

Aftershocks so far

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

  1. 2.3 4 km N of Port Townsend, Washington
  2. 2.0 5 km NW of Jamestown, Washington
  3. 2.0 3 km SW of Mount Vernon, Washington
  4. 1.7 2 km NW of Indianola, Washington
  5. 2.2 7 km W of Clinton, Washington
  6. 1.5 8 km SSE of Coupeville, Washington
  7. 1.7 6 km SSE of Port Ludlow, Washington
  8. 2.5 0 km N of Woodway, Washington
  9. 2.4 6 km SW of Bay View, Washington
  10. 2.3 6 km SW of Bay View, Washington
  11. 1.6 9 km NNE of Quilcene, Washington
  12. 1.7 5 km SW of Hansville, Washington
  13. 1.5 2 km S of Big Lake, Washington
  14. 1.5 2 km NNW of Indianola, Washington
  15. 1.7 7 km N of Ault Field, 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.