QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

6 km WSW of Clinton, Washington

· 13 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 27 kmKitsap County 40 kmSnohomish County 51 kmKing County 70 kmSkagit County 75 kmSan Juan County 78 kmJefferson County 83 kmMason County 88 kmPierce County 104 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 1.8 (ml)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Island County, 27 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2498 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 47.9668, -122.4400. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 27 km (17 mi) SE of here earthquakes near Island County
Kitsap County, WA 40 km (25 mi) NNE of here earthquakes near Kitsap County
Snohomish County, WA 51 km (32 mi) W of here earthquakes near Snohomish County
King County, WA 70 km (43 mi) NW of here earthquakes near King County
Skagit County, WA 75 km (46 mi) SW of here earthquakes near Skagit County
San Juan County, WA 78 km (48 mi) SE of here earthquakes near San Juan 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. 1.8 2 km WSW of Shoreline, Washington
  2. 1.6 Puget Sound region, Washington
  3. 1.8 4 km SSW of Erlands Point-Kitsap Lake, Washington
  4. 2.5 3 km W of Monroe, Washington
  5. 1.7 3 km SSW of Roosevelt, Washington
  6. 2.4 5 km E of Quilcene, Washington
  7. 1.7 4 km E of Granite Falls, Washington
  8. 1.5 Washington
  9. 1.7 2 km NNW of Indianola, Washington
  10. 1.8 2 km S of Keyport, Washington
  11. 1.6 5 km WSW of Coupeville, Washington
  12. 1.7 0 km ESE of Enetai, Washington
  13. 2.5 3 km SW of Woodway, Washington
  14. 1.6 0 km ESE of Granite Falls, Washington
  15. 1.9 6 km ENE of Marrowstone, 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 14,000 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.