QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

7 km NE of Marrowstone, Washington

· 26 km deep · released about 20 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 7 kmKitsap County 52 kmSan Juan County 57 kmSnohomish County 64 kmSkagit County 73 kmJefferson County 75 kmKing County 91 kmMason County 94 kmClallam County 94 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 1.9 (ml)
Depth
26 km below the surface
Felt
no reports yet
Nearest
Island County, 7 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2156 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 20 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 48.1092, -122.6223. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 7 km (4 mi) SSE of here earthquakes near Island County
Kitsap County, WA 52 km (32 mi) N of here earthquakes near Kitsap County
San Juan County, WA 57 km (35 mi) SE of here earthquakes near San Juan County
Snohomish County, WA 64 km (40 mi) W of here earthquakes near Snohomish County
Skagit County, WA 73 km (46 mi) SW of here earthquakes near Skagit County
Jefferson County, WA 75 km (47 mi) ENE of here earthquakes near Jefferson County

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

Aftershocks so far

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

  1. 1.7 1 km SE of Mount Vernon, Washington
  2. 1.5 2 km W of Big Lake, Washington
  3. 1.6 3 km NNW of La Conner, Washington
  4. 1.9 2 km NE of Keyport, Washington
  5. 3.0 2 km ESE of Big Lake, Washington
  6. 1.8 5 km SSW of Port Ludlow, Washington
  7. 1.7 11 km WNW of Coupeville, Washington
  8. 1.5 1 km SSW of Lynnwood, Washington
  9. 1.8 1 km NE of Oak Harbor, Washington
  10. 1.8 8 km SW of Anacortes, Washington
  11. 1.9 2 km NW of Indianola, Washington
  12. 2.1 1 km ESE of Burlington, Washington
  13. 2.5 13 km WNW of Ault Field, Washington
  14. 1.8 5 km SSW of Port Ludlow, Washington
  15. 1.7 5 km WSW of Lake Cavanaugh, 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.