QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

4 km ENE of May Creek, Washington

· 7.9 km deep · released about 9.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Snohomish County 24 kmKing County 45 kmSkagit County 71 kmChelan County 74 kmKitsap County 81 kmIsland County 85 kmPierce County 99 kmKittitas County 109 kmWhatcom County 110 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
7.9 km below the surface
Felt
no reports yet
Nearest
Snohomish County, 24 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3218 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 9.3 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 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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 47.8670, -121.6168. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Snohomish County, WA 24 km (15 mi) SSE of here earthquakes near Snohomish County
King County, WA 45 km (28 mi) NNE of here earthquakes near King County
Skagit County, WA 71 km (44 mi) SSE of here earthquakes near Skagit County
Chelan County, WA 74 km (46 mi) W of here earthquakes near Chelan County
Kitsap County, WA 81 km (50 mi) ENE of here earthquakes near Kitsap County
Island County, WA 85 km (53 mi) ESE of here earthquakes near Island County

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

Aftershocks so far

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

  1. 2.1 Washington
  2. 1.9 1 km NE of Tanner, Washington
  3. 1.9 3 km ENE of Granite Falls, Washington
  4. 1.6 4 km WSW of Monroe, Washington
  5. 1.8 2 km S of Lake Roesiger, Washington
  6. 2.0 4 km SSW of Roosevelt, Washington
  7. 1.8 4 km ENE of Granite Falls, Washington
  8. 2.0 10 km ENE of Fall City, Washington
  9. 1.8 2 km S of Lake Roesiger, Washington
  10. 2.0 1 km NNE of Silver Firs, Washington
  11. 1.5 0 km NNE of Lake Marcel-Stillwater, Washington
  12. 1.6 Washington
  13. 2.2 5 km ENE of Lake Roesiger, Washington
  14. 2.2 0 km S of Union Hill-Novelty Hill, Washington
  15. 1.9 3 km ENE 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.