QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

0 km NNE of Mercer Island, Washington

· 0.4 km deep · released about 6.4 lb of TNT

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10 km30 km60 km120 km N King County 30 kmKitsap County 33 kmPierce County 59 kmSnohomish County 63 kmIsland County 73 kmMason County 76 kmThurston County 85 kmJefferson County 101 kmSkagit County 106 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
0.4 km below the surface
Felt
no reports yet
Nearest
King County, 30 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3375 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 47.5785, -122.2165. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 30 km (19 mi) WNW of here earthquakes near King County
Kitsap County, WA 33 km (21 mi) ESE of here earthquakes near Kitsap County
Pierce County, WA 59 km (37 mi) N of here earthquakes near Pierce County
Snohomish County, WA 63 km (39 mi) SSW of here earthquakes near Snohomish County
Island County, WA 73 km (45 mi) SSE of here earthquakes near Island County
Mason County, WA 76 km (47 mi) ENE of here earthquakes near Mason County

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

Aftershocks so far

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

  1. 1.7 1 km NW of Maple Valley, Washington
  2. 1.6 3 km WSW of West Lake Stevens, Washington
  3. 1.8 4 km SE of Ames Lake, Washington
  4. 1.9 0 km SSE of Enetai, Washington
  5. 1.6 3 km NW of Burley, Washington
  6. 1.8 3 km NW of Cottage Lake, Washington
  7. 1.7 2 km WNW of Federal Way, Washington
  8. 1.7 1 km NNE of Lynnwood, Washington
  9. 2.1 5 km ESE of Indianola, Washington
  10. 1.9 1 km WNW of Bonney Lake, Washington
  11. 1.5 3 km N of Union Hill-Novelty Hill, Washington
  12. 1.5 1 km N of White Center, Washington
  13. 2.0 0 km WNW of Bonney Lake, Washington
  14. 2.2 2 km ENE of Enetai, Washington
  15. 1.6 5 km NNE of Dash Point, 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.

On USGS

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