QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Puget Sound region, Washington

· 30 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Snohomish County 33 kmKing County 40 kmKitsap County 50 kmIsland County 59 kmSkagit County 76 kmPierce County 86 kmMason County 100 kmChelan County 107 kmSan Juan County 109 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
30 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Snohomish County, 33 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1263 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

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 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 95× 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 47.8250, -122.0468. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Snohomish County, WA 33 km (21 mi) SW of here earthquakes near Snohomish County
King County, WA 40 km (25 mi) NNW of here earthquakes near King County
Kitsap County, WA 50 km (31 mi) ENE of here earthquakes near Kitsap County
Island County, WA 59 km (37 mi) SE of here earthquakes near Island County
Skagit County, WA 76 km (47 mi) SSW of here earthquakes near Skagit County
Pierce County, WA 86 km (54 mi) N of here earthquakes near Pierce County

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

Aftershocks so far

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

  1. 1.6 1 km NE of Mirrormont, Washington
  2. 1.5 1 km E of Granite Falls, Washington
  3. 1.9 5 km SSE of Seattle, Washington
  4. 1.9 10 km NE of Lake Marcel-Stillwater, Washington
  5. 1.6 2 km W of Clinton, Washington
  6. 2.1 3 km ENE of East Renton Highlands, Washington
  7. 1.5 3 km SSE of Stanwood, Washington
  8. 2.4 8 km SSW of Sultan, Washington
  9. 1.6 11 km NE of Snoqualmie, Washington
  10. 2.1 1 km NW of Meadowdale, Washington
  11. 1.6 Washington
  12. 2.6 11 km NE of Snoqualmie, Washington
  13. 1.7 8 km NE of Fall City, Washington
  14. 2.3 0 km WSW of Bothell West, Washington
  15. 1.7 3 km ENE of Bainbridge Island, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2019-07-12 — it released about 22,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.