QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

5 km E of Acme, Washington

· 11 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Whatcom County 25 kmSkagit County 35 kmIsland County 75 kmSan Juan County 76 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 1.8 (ml)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Whatcom County, 25 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 76 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 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× the energy of this one
  4. This earthquake M 1.8 about 13 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 48.7252, -122.1283. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Whatcom County, WA 25 km (16 mi) WSW of here earthquakes near Whatcom County
Skagit County, WA 35 km (21 mi) NW of here earthquakes near Skagit County
Island County, WA 75 km (46 mi) NNE of here earthquakes near Island County
San Juan County, WA 76 km (47 mi) ENE of here earthquakes near San Juan County
Snohomish County, WA 79 km (49 mi) NNW of here earthquakes near Snohomish County
Jefferson County, WA 146 km (90 mi) NE of here earthquakes near Jefferson County

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

Aftershocks so far

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

  1. 0.7 6 km SSE of Concrete, Washington
  2. 0.9 9 km ENE of Abbotsford, Canada
  3. 1.2 12 km ENE of Mission, Canada
  4. 1.6 3 km WSW of Lake Cavanaugh, Washington
  5. 2.6 2 km ENE of Mount Vernon, Washington
  6. 1.6 7 km ENE of Abbotsford, Canada
  7. 1.8 15 km ESE of Acme, Washington
  8. 1.9 7 km SSE of Concrete, Washington
  9. 1.9 2 km NNE of Lyman, Washington
  10. 1.8 8 km N of Maple Falls, Washington
  11. 1.5 11 km NE of Abbotsford, Canada
  12. 1.7 3 km N of Lyman, Washington
  13. 2.2 2 km N of Lyman, Washington
  14. 1.6 5 km N 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.