QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

6 km ENE of Marrowstone, Washington

· 26 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 9 kmKitsap County 49 kmSan Juan County 59 kmSnohomish County 64 kmJefferson County 74 kmSkagit County 75 kmKing County 88 kmMason County 91 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, 9 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2278 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 25 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 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 48.0842, -122.6197. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 9 km (6 mi) SSE of here earthquakes near Island County
Kitsap County, WA 49 km (31 mi) N of here earthquakes near Kitsap County
San Juan County, WA 59 km (37 mi) SE of here earthquakes near San Juan County
Snohomish County, WA 64 km (40 mi) W of here earthquakes near Snohomish County
Jefferson County, WA 74 km (46 mi) ENE of here earthquakes near Jefferson County
Skagit County, WA 75 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

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

  1. 2.5 13 km WNW of Ault Field, Washington
  2. 1.8 5 km SSW of Port Ludlow, Washington
  3. 1.7 5 km WSW of Lake Cavanaugh, Washington
  4. 1.7 2 km ESE of Burlington, Washington
  5. 2.2 3 km ESE of Burlington, Washington
  6. 1.7 12 km ENE of Jamestown, Washington
  7. 1.9 2 km NNE of Esperance, Washington
  8. 2.2 2 km N of Mount Vernon, Washington
  9. 1.8 3 km NW of Mount Vernon, Washington
  10. 1.8 5 km SW of Lake Cavanaugh, Washington
  11. 2.3 7 km SSE of Coupeville, Washington
  12. 2.2 5 km E of Big Lake, Washington
  13. 1.7 6 km NNW of Lofall, Washington
  14. 1.8 5 km S of Hansville, Washington
  15. 1.6 8 km NE of Jamestown, 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.