QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

4 km SW of Big Lake, Washington

· 19 km deep · released about 20 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 37 kmSkagit County 38 kmSnohomish County 53 kmSan Juan County 61 kmWhatcom County 62 kmKitsap County 86 kmKing County 104 kmJefferson County 111 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
19 km below the surface
Felt
no reports yet
Nearest
Island County, 37 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 564 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 48.3768, -122.2955. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 37 km (23 mi) NE of here earthquakes near Island County
Skagit County, WA 38 km (23 mi) WSW of here earthquakes near Skagit County
Snohomish County, WA 53 km (33 mi) NW of here earthquakes near Snohomish County
San Juan County, WA 61 km (38 mi) ESE of here earthquakes near San Juan County
Whatcom County, WA 62 km (38 mi) SSW of here earthquakes near Whatcom County
Kitsap County, WA 86 km (53 mi) NNE of here earthquakes near Kitsap County

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

Aftershocks so far

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

  1. 2.7 8 km NNW of Swede Heaven, Washington
  2. 1.9 5 km WSW of Stanwood, Washington
  3. 1.5 10 km E of Orcas, Washington
  4. 4.5 2025 Orcas Island, Washington
  5. 1.6 15 km NNE of Lyman, Washington
  6. 2.3 1 km SW of West Lake Stevens, Washington
  7. 1.6 2 km NE of Granite Falls, Washington
  8. 1.7 2 km N of Bryant, Washington
  9. 1.7 5 km WSW of Clinton, Washington
  10. 1.6 5 km N of Port Townsend, Washington
  11. 1.7 2 km E of Granite Falls, Washington
  12. 1.9 3 km W of Mount Vernon, Washington
  13. 2.0 9 km W of Coupeville, Washington
  14. 1.8 4 km NNW of Port Townsend, Washington
  15. 2.0 10 km NNE of Hamilton, 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.