QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

12 km S of Darrington, Washington

· 9.8 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Snohomish County 15 kmSkagit County 42 kmKing County 74 kmIsland County 79 kmWhatcom County 80 kmChelan County 80 kmKitsap County 95 kmSan Juan County 118 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 1.5 (ml)
Depth
9.8 km below the surface
Felt
no reports yet
Nearest
Snohomish County, 15 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2993 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 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 48.1413, -121.6112. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Snohomish County, WA 15 km (9 mi) NE of here earthquakes near Snohomish County
Skagit County, WA 42 km (26 mi) SSE of here earthquakes near Skagit County
King County, WA 74 km (46 mi) NNE of here earthquakes near King County
Island County, WA 79 km (49 mi) E of here earthquakes near Island County
Whatcom County, WA 80 km (50 mi) SSE of here earthquakes near Whatcom County
Chelan County, WA 80 km (50 mi) WNW of here earthquakes near Chelan County

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

Aftershocks so far

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

  1. 1.6 5 km WSW of Darrington, Washington
  2. 1.6 3 km E of Cathcart, Washington
  3. 2.1 3 km ENE of Granite Falls, Washington
  4. 1.6 3 km ENE of Cathcart, Washington
  5. 1.7 2 km ENE of Granite Falls, Washington
  6. 1.8 3 km E of Cathcart, Washington
  7. 1.6 4 km ENE of Cathcart, Washington
  8. 1.6 4 km SSW of Roosevelt, Washington
  9. 3.0 4 km ENE of Cathcart, Washington
  10. 1.7 4 km ENE of Cathcart, Washington
  11. 2.4 4 km SSW of Roosevelt, Washington
  12. 1.9 4 km SSW of Roosevelt, Washington
  13. 2.5 3 km W of Monroe, Washington
  14. 1.6 3 km ENE of Cathcart, Washington
  15. 2.3 4 km SSW of Roosevelt, 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.