QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

3 km SW of Acme, Washington

· 13 km deep · released about 610 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Whatcom County 34 kmSkagit County 38 kmSan Juan County 67 kmIsland County 67 kmSnohomish County 79 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 2.9 (ml)
Depth
13 km below the surface
Felt
46 reports · strongest reported intensity III
Nearest
Whatcom County, 34 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2417 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 46 people have reported feeling it to USGS.

How big was it?

This earthquake released about 610 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 25,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 18,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.6× the energy of this one
  4. This earthquake M 2.9 about 610 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 48.6905, -122.2380. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Whatcom County, WA 34 km (21 mi) WSW of here earthquakes near Whatcom County
Skagit County, WA 38 km (24 mi) NW of here earthquakes near Skagit County
San Juan County, WA 67 km (42 mi) ENE of here earthquakes near San Juan County
Island County, WA 67 km (42 mi) NNE of here earthquakes near Island County
Snohomish County, WA 79 km (49 mi) NNW of here earthquakes near Snohomish County
Kitsap County, WA 121 km (75 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

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

  1. 2.0 8 km NNE of Hamilton, Washington
  2. 2.8 9 km NNE of Hamilton, Washington
  3. 1.9 8 km NNE of Hamilton, Washington
  4. 1.8 9 km NNE of Hamilton, Washington
  5. 1.5 5 km WSW of Acme, Washington
  6. 2.0 3 km WSW of Kendall, Washington
  7. 1.6 0 km S of Big Lake, Washington
  8. 1.7 3 km WSW of Lake Cavanaugh, Washington
  9. 2.0 6 km SE of Bay View, Washington
  10. 2.1 6 km SSE of Maple Falls, Washington
  11. 2.2 5 km NE of Oak Harbor, Washington
  12. 2.1 5 km SW of Everson, Washington
  13. 1.5 8 km ESE of Abbotsford, Canada
  14. 1.6 3 km NW of Glacier, Washington
  15. 1.7 5 km NNE of Anacortes, 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.