QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

3 km W of Mount Vernon, Washington

· 10 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 36 kmSkagit County 43 kmSan Juan County 54 kmSnohomish County 62 kmWhatcom County 62 kmKitsap County 89 kmJefferson County 109 kmKing County 112 kmClallam County 117 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
10 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Island County, 36 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 693 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 19 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 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 48.4227, -122.3870. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 36 km (22 mi) NE of here earthquakes near Island County
Skagit County, WA 43 km (27 mi) W of here earthquakes near Skagit County
San Juan County, WA 54 km (33 mi) E of here earthquakes near San Juan County
Snohomish County, WA 62 km (38 mi) NW of here earthquakes near Snohomish County
Whatcom County, WA 62 km (38 mi) SW of here earthquakes near Whatcom County
Kitsap County, WA 89 km (55 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

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

  1. 2.1 2 km NNE of La Conner, Washington
  2. 2.1 2 km NE of La Conner, Washington
  3. 1.9 2 km NE of La Conner, Washington
  4. 1.9 7 km S of La Conner, Washington
  5. 1.7 3 km NNW of Warm Beach, Washington
  6. 1.6 4 km W of Mount Vernon, Washington
  7. 1.7 4 km W of Mount Vernon, Washington
  8. 1.6 8 km NNE of Sedro-Woolley, Washington
  9. 1.7 1 km E of Granite Falls, Washington
  10. 2.1 6 km WNW of Coupeville, Washington
  11. 2.9 7 km ENE of Marrowstone, Washington
  12. 1.8 2 km ESE of Mount Vernon, Washington
  13. 2.4 2 km ESE of Mount Vernon, Washington
  14. 2.2 2 km SE of Mount Vernon, Washington
  15. 2.9 2 km ESE of Mount Vernon, 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 4.3 on 2023-10-09 — it released about 4,700 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.