QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

2 km ESE of Mount Vernon, Washington

· 10 km deep · released about 100 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Skagit County 38 kmIsland County 39 kmSnohomish County 57 kmWhatcom County 59 kmSan Juan County 59 kmKitsap County 90 kmKing County 108 kmJefferson County 113 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
10 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Skagit County, 38 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 320 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 100 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 5.8 140,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 100,000× the energy of this one
  3. Around the size people start to feel M 3.0 9.1× the energy of this one
  4. This earthquake M 2.4 about 100 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 48.4125, -122.3103. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Skagit County, WA 38 km (23 mi) WSW of here earthquakes near Skagit County
Island County, WA 39 km (24 mi) NE of here earthquakes near Island County
Snohomish County, WA 57 km (35 mi) NW of here earthquakes near Snohomish County
Whatcom County, WA 59 km (37 mi) SW of here earthquakes near Whatcom County
San Juan County, WA 59 km (37 mi) E of here earthquakes near San Juan County
Kitsap County, WA 90 km (56 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

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

  1. 1.6 3 km E of Granite Falls, Washington
  2. 1.9 4 km E of Port Townsend, Washington
  3. 1.8 5 km E of Acme, Washington
  4. 1.8 2 km ESE of Oak Harbor, Washington
  5. 1.9 3 km E of Oak Harbor, Washington
  6. 2.3 3 km ESE of Oak Harbor, Washington
  7. 2.0 2 km E of Oak Harbor, Washington
  8. 2.3 2 km E of Oak Harbor, Washington
  9. 3.8 2 km E of Oak Harbor, Washington
  10. 2.4 2 km ESE of Oak Harbor, Washington
  11. 1.7 2 km ENE of Granite Falls, Washington
  12. 1.5 2 km E of Oak Harbor, Washington
  13. 2.0 2 km ESE of Oak Harbor, Washington
  14. 1.6 2 km ESE of Oak Harbor, Washington
  15. 2.4 2 km ESE of Oak Harbor, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.5 on 2025-03-03 — it released about 1,600 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.