QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

2 km NE of Lake Roesiger, Washington

· 17 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Snohomish County 12 kmSkagit County 55 kmKing County 57 kmIsland County 60 kmKitsap County 69 kmWhatcom County 94 kmChelan County 97 kmSan Juan County 106 kmPierce County 107 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 1.7 (ml)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Snohomish County, 12 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3535 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 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 92× the energy of this one
  4. This earthquake M 1.7 about 10 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 47.9993, -121.8982. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Snohomish County, WA 12 km (7 mi) WSW of here earthquakes near Snohomish County
Skagit County, WA 55 km (34 mi) S of here earthquakes near Skagit County
King County, WA 57 km (35 mi) N of here earthquakes near King County
Island County, WA 60 km (37 mi) ESE of here earthquakes near Island County
Kitsap County, WA 69 km (43 mi) NE of here earthquakes near Kitsap County
Whatcom County, WA 94 km (58 mi) S of here earthquakes near Whatcom 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. 1.8 3 km E of Granite Falls, Washington
  2. 1.5 3 km N of Union Hill-Novelty Hill, Washington
  3. 1.7 4 km ENE of May Creek, Washington
  4. 2.2 5 km NE of Oso, Washington
  5. 1.8 3 km E of Granite Falls, Washington
  6. 1.8 2 km WSW of Shoreline, Washington
  7. 2.0 6 km WSW of Lake Cavanaugh, Washington
  8. 1.5 1 km N of Carnation, Washington
  9. 2.2 10 km E of Verlot, Washington
  10. 1.8 3 km E of Granite Falls, Washington
  11. 2.2 11 km E of Verlot, Washington
  12. 1.8 4 km WSW of Inglewood-Finn Hill, Washington
  13. 1.5 2 km ENE of Union Hill-Novelty Hill, Washington
  14. 1.6 1 km NE of Yarrow Point, Washington
  15. 1.7 3 km E of Granite 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.