QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

5 km SE of Lea Hill, Washington

· 24 km deep · released about 38 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 26 kmKing County 32 kmKitsap County 55 kmThurston County 65 kmMason County 78 kmLewis County 81 kmSnohomish County 90 kmIsland County 105 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 2.1 (ml)
Depth
24 km below the surface
Felt
no reports yet
Nearest
Pierce County, 26 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2918 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 38 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 390,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
  3. Around the size people start to feel M 3.0 25× the energy of this one
  4. This earthquake M 2.1 about 38 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 47.2877, -122.1400. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 26 km (16 mi) N of here earthquakes near Pierce County
King County, WA 32 km (20 mi) SW of here earthquakes near King County
Kitsap County, WA 55 km (34 mi) SE of here earthquakes near Kitsap County
Thurston County, WA 65 km (41 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 81 km (50 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

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

  1. 1.6 10 km ESE of Enumclaw, Washington
  2. 2.3 0 km ESE of Riverton, Washington
  3. 1.9 11 km ESE of Enumclaw, Washington
  4. 1.9 1 km WNW of DuPont, Washington
  5. 1.9 0 km SE of Normandy Park, Washington
  6. 1.8 1 km NE of Normandy Park, Washington
  7. 1.6 0 km E of Normandy Park, Washington
  8. 2.3 1 km NNE of Enetai, Washington
  9. 1.6 3 km W of Federal Way, Washington
  10. 1.6 11 km W of Greenwater, Washington
  11. 1.7 8 km SSW of Wilderness Rim, Washington
  12. 2.6 8 km SSW of Wilderness Rim, Washington
  13. 2.0 10 km ENE of Fall City, Washington
  14. 1.8 1 km E of Browns Point, Washington
  15. 1.8 13 km ESE of Enumclaw, 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.