QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

5 km NNE of Woods Creek, Washington

· 15 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Snohomish County 17 kmKing County 48 kmSkagit County 64 kmIsland County 65 kmKitsap County 66 kmChelan County 94 kmPierce County 99 kmWhatcom County 102 kmSan Juan County 112 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 1.6 (ml)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Snohomish County, 17 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1963 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 6.4 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 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 47.9225, -121.8778. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Snohomish County, WA 17 km (11 mi) SSW of here earthquakes near Snohomish County
King County, WA 48 km (30 mi) N of here earthquakes near King County
Skagit County, WA 64 km (40 mi) S of here earthquakes near Skagit County
Island County, WA 65 km (40 mi) ESE of here earthquakes near Island County
Kitsap County, WA 66 km (41 mi) ENE of here earthquakes near Kitsap County
Chelan County, WA 94 km (58 mi) W of here earthquakes near Chelan County

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

Aftershocks so far

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

  1. 1.6 2 km E of Granite Falls, Washington
  2. 1.5 5 km NNE of Duvall, Washington
  3. 1.9 1 km ESE of Esperance, Washington
  4. 2.2 1 km NNE of Cathcart, Washington
  5. 1.8 2 km ENE of Granite Falls, Washington
  6. 1.8 14 km S of Gold Bar, Washington
  7. 2.0 8 km NE of Granite Falls, Washington
  8. 1.5 1 km E of Ames Lake, Washington
  9. 1.6 2 km ENE of Granite Falls, Washington
  10. 2.0 4 km SE of Swede Heaven, Washington
  11. 1.7 6 km NE of Snoqualmie, Washington
  12. 1.7 5 km SW of Fall City, Washington
  13. 1.7 3 km E of Carnation, Washington
  14. 2.1 7 km W of Lake Cavanaugh, Washington
  15. 1.5 1 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2019-07-12 — it released about 35,000 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.