QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

4 km SSW of Clinton, Washington

· 30 km deep · released about 6.2 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 33 kmKitsap County 39 kmSnohomish County 47 kmKing County 64 kmSkagit County 74 kmSan Juan County 83 kmJefferson County 87 kmMason County 89 kmPierce County 100 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 1.5 (ml)
Depth
30 km below the surface
Felt
no reports yet
Nearest
Island County, 33 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1419 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 6.2 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 2,500,000× 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 1.5 about 6.2 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 47.9403, -122.3718. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 33 km (20 mi) SE of here earthquakes near Island County
Kitsap County, WA 39 km (24 mi) NNE of here earthquakes near Kitsap County
Snohomish County, WA 47 km (29 mi) WSW of here earthquakes near Snohomish County
King County, WA 64 km (40 mi) NW of here earthquakes near King County
Skagit County, WA 74 km (46 mi) SW of here earthquakes near Skagit County
San Juan County, WA 83 km (52 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

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

  1. 1.5 2 km E of Granite Falls, Washington
  2. 1.8 1 km ESE of Union Hill-Novelty Hill, Washington
  3. 2.3 6 km SE of Port Ludlow, Washington
  4. 1.6 0 km NNE of Lake Marcel-Stillwater, Washington
  5. 1.9 4 km SW of Port Ludlow, Washington
  6. 1.8 4 km NNW of Bryant, Washington
  7. 1.6 Puget Sound region, Washington
  8. 1.7 4 km E of Granite Falls, Washington
  9. 1.6 0 km N of Lake Marcel-Stillwater, Washington
  10. 1.6 3 km SSE of Quilcene, Washington
  11. 1.7 5 km SW of Port Ludlow, Washington
  12. 2.0 3 km N of White Center, Washington
  13. 2.3 6 km WSW of Shoreline, Washington
  14. 1.6 4 km W of Bainbridge Island, Washington
  15. 1.6 2 km NE of Esperance, 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 36,000 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.