QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

Washington

· -0.4 km deep · released about 44 lb of TNT

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10 km30 km60 km120 km N Whatcom County 24 kmSkagit County 44 kmSan Juan County 77 kmIsland County 82 kmSnohomish County 90 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 2.1 (ml)
Depth
-0.4 km below the surface
Felt
7 reports · strongest reported intensity III
Nearest
Whatcom County, 24 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1387 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 7 people have reported feeling it to USGS.

How big was it?

This earthquake released about 44 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 340,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 240,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 44 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 48.8187, -122.1680. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Whatcom County, WA 24 km (15 mi) W of here earthquakes near Whatcom County
Skagit County, WA 44 km (28 mi) NW of here earthquakes near Skagit County
San Juan County, WA 77 km (48 mi) ENE of here earthquakes near San Juan County
Island County, WA 82 km (51 mi) NNE of here earthquakes near Island County
Snohomish County, WA 90 km (56 mi) NNW of here earthquakes near Snohomish County
Jefferson County, WA 151 km (94 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

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

  1. 1.5 10 km E of Mission, Canada
  2. 2.0 10 km NNE of Hamilton, Washington
  3. 1.5 11 km ENE of Mission, Canada
  4. 1.8 2 km E of Peaceful Valley, Washington
  5. 2.6 15 km NNE of Lyman, Washington
  6. 1.9 6 km S of Acme, Washington
  7. 1.7 6 km NW of Glacier, Washington
  8. 1.9 14 km ESE of Acme, Washington
  9. 1.8 14 km NNE of Lyman, Washington
  10. 2.0 2 km WNW of Deming, Washington
  11. 1.5 4 km SSW of Marietta, Washington
  12. 1.9 2 km S of Marietta-Alderwood, Washington
  13. 2.2 2 km S of Marietta-Alderwood, Washington
  14. 1.6 6 km W of Edison, Washington
  15. 1.7 10 km NNE of Maple Falls, 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.