QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

5 km W of Weallup Lake, Washington

· 60 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 22 kmSnohomish County 46 kmKitsap County 56 kmSkagit County 60 kmSan Juan County 69 kmKing County 80 kmWhatcom County 91 kmJefferson County 92 kmMason County 103 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
60 km below the surface
Felt
no reports yet
Nearest
Island County, 22 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 554 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 12 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 48.1122, -122.3848. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 22 km (14 mi) ESE of here earthquakes near Island County
Snohomish County, WA 46 km (29 mi) W of here earthquakes near Snohomish County
Kitsap County, WA 56 km (35 mi) NNE of here earthquakes near Kitsap County
Skagit County, WA 60 km (37 mi) SW of here earthquakes near Skagit County
San Juan County, WA 69 km (43 mi) SE of here earthquakes near San Juan County
King County, WA 80 km (50 mi) NNW of here earthquakes near King County

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

Aftershocks so far

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

  1. 2.2 3 km SW of Port Ludlow, Washington
  2. 1.5 1 km NE of Esperance, Washington
  3. 1.9 3 km NE of Quilcene, Washington
  4. 1.7 4 km W of Mount Vernon, Washington
  5. 1.7 2 km ENE of Granite Falls, Washington
  6. 1.7 1 km E of Granite Falls, Washington
  7. 1.7 4 km S of Monroe, Washington
  8. 2.1 6 km WNW of Coupeville, Washington
  9. 2.9 7 km ENE of Marrowstone, Washington
  10. 1.8 2 km ESE of Mount Vernon, Washington
  11. 1.9 4 km WSW of Shoreline, Washington
  12. 1.9 1 km NNE of Suquamish, Washington
  13. 2.4 2 km ESE of Mount Vernon, Washington
  14. 2.2 2 km SE of Mount Vernon, Washington
  15. 2.9 2 km ESE of Mount Vernon, 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 18,000 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.