QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

9 km NNW of Freeland, Washington

· 21 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 11 kmKitsap County 50 kmSnohomish County 60 kmSan Juan County 61 kmSkagit County 72 kmJefferson County 77 kmKing County 86 kmMason County 93 kmClallam County 98 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 1.8 (ml)
Depth
21 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Island County, 11 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2610 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 48.0848, -122.5738. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 11 km (7 mi) SE of here earthquakes near Island County
Kitsap County, WA 50 km (31 mi) N of here earthquakes near Kitsap County
Snohomish County, WA 60 km (37 mi) W of here earthquakes near Snohomish County
San Juan County, WA 61 km (38 mi) SE of here earthquakes near San Juan County
Skagit County, WA 72 km (45 mi) SW of here earthquakes near Skagit County
Jefferson County, WA 77 km (48 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

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

  1. 1.9 7 km NE of Marrowstone, Washington
  2. 1.6 5 km NNE of Lofall, Washington
  3. 1.6 13 km W of Coupeville, Washington
  4. 1.8 6 km S of Port Ludlow, Washington
  5. 1.7 4 km NE of Oak Harbor, Washington
  6. 1.8 2 km WSW of Shoreline, Washington
  7. 1.7 3 km SSW of Roosevelt, Washington
  8. 2.4 5 km E of Quilcene, Washington
  9. 1.7 2 km NNW of Indianola, Washington
  10. 1.8 2 km S of Keyport, Washington
  11. 1.6 5 km WSW of Coupeville, Washington
  12. 2.5 3 km SW of Woodway, Washington
  13. 2.4 11 km W of Ault Field, Washington
  14. 1.9 6 km ENE of Marrowstone, Washington
  15. 1.7 2 km NE of Port Ludlow, 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.