QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4ml

6 km SSE of Lea Hill, Washington

· 25 km deep · released about 2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 25 kmKing County 33 kmKitsap County 56 kmThurston County 64 kmMason County 78 kmLewis County 79 kmSnohomish County 91 kmIsland County 106 kmKittitas 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 3.4 (ml)
Depth
25 km below the surface
Felt
1640 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
Pierce County, 25 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 509 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1640 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 86,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,700× the energy of this one
  4. This earthquake M 3.4 about 2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.1× more

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 47.2760, -122.1417. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 25 km (16 mi) N of here earthquakes near Pierce County
King County, WA 33 km (21 mi) SW of here earthquakes near King County
Kitsap County, WA 56 km (35 mi) SE of here earthquakes near Kitsap County
Thurston County, WA 64 km (40 mi) NE of here earthquakes near Thurston County
Mason County, WA 78 km (49 mi) E of here earthquakes near Mason County
Lewis County, WA 79 km (49 mi) NNE of here earthquakes near Lewis County

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

Aftershocks so far

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

  1. 1.7 7 km ENE of Manchester, Washington
  2. 2.1 4 km E of Enumclaw, Washington
  3. 1.7 17 km NE of Ashford, Washington
  4. 1.6 2 km WSW of Kapowsin, Washington
  5. 1.7 2 km SSW of Kapowsin, Washington
  6. 1.7 3 km NNE of Dash Point, Washington
  7. 1.6 2 km S of Kapowsin, Washington
  8. 1.9 3 km SE of Gorst, Washington
  9. 1.6 1 km NNW of Boulevard Park, Washington
  10. 1.8 1 km NNW of Maple Valley, Washington
  11. 1.7 2 km NNE of Enetai, Washington
  12. 1.6 1 km SW of Burien, Washington
  13. 1.8 8 km ESE of Carbonado, Washington
  14. 1.8 1 km S of Kapowsin, Washington
  15. 1.8 8 km NE of Fall City, 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.