QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

11 km W of Ault Field, Washington

· 16 km deep · released about 130 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 24 kmSan Juan County 27 kmSkagit County 76 kmJefferson County 80 kmKitsap County 80 kmClallam County 83 kmSnohomish County 85 kmWhatcom County 91 kmMason County 114 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 2.4 (ml)
Depth
16 km below the surface
Felt
8 reports · strongest reported intensity III
Nearest
Island County, 24 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2186 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 8 people have reported feeling it to USGS.

How big was it?

This earthquake released about 130 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 110,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 80,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.2× the energy of this one
  4. This earthquake M 2.4 about 130 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 48.3507, -122.8278. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 24 km (15 mi) NNW of here earthquakes near Island County
San Juan County, WA 27 km (17 mi) SE of here earthquakes near San Juan County
Skagit County, WA 76 km (47 mi) WSW of here earthquakes near Skagit County
Jefferson County, WA 80 km (50 mi) NE of here earthquakes near Jefferson County
Kitsap County, WA 80 km (50 mi) N of here earthquakes near Kitsap County
Clallam County, WA 83 km (52 mi) ENE of here earthquakes near Clallam County

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

Aftershocks so far

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

  1. 1.9 8 km ENE of Port Townsend, Washington
  2. 1.7 1 km SE of Mount Vernon, Washington
  3. 1.6 3 km NNW of La Conner, Washington
  4. 2.4 8 km N of Anacortes, Washington
  5. 1.8 8 km WNW of Orcas, Washington
  6. 1.7 8 km WNW of Orcas, Washington
  7. 1.7 11 km WNW of Coupeville, Washington
  8. 1.6 16 km NNW of Jamestown, Washington
  9. 1.8 1 km NE of Oak Harbor, Washington
  10. 1.8 8 km SW of Anacortes, Washington
  11. 2.1 1 km ESE of Burlington, Washington
  12. 2.5 13 km WNW of Ault Field, Washington
  13. 1.8 3 km NNE of Burlington, Washington
  14. 1.7 2 km ESE of Burlington, Washington
  15. 2.2 3 km ESE of Burlington, 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.