QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

2 km ESE of Buckley, Washington

· 18 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 16 kmKing County 40 kmThurston County 67 kmLewis County 70 kmKitsap County 73 kmMason County 91 kmKittitas County 100 kmSnohomish County 102 kmCowlitz County 118 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 1.8 (ml)
Depth
18 km below the surface
Felt
no reports yet
Nearest
Pierce County, 16 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 339 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 47.1525, -121.9992. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 16 km (10 mi) NE of here earthquakes near Pierce County
King County, WA 40 km (25 mi) SSW of here earthquakes near King County
Thurston County, WA 67 km (42 mi) ENE of here earthquakes near Thurston County
Lewis County, WA 70 km (43 mi) NNE of here earthquakes near Lewis County
Kitsap County, WA 73 km (45 mi) SE of here earthquakes near Kitsap County
Mason County, WA 91 km (57 mi) ESE 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. 1.5 11 km NE of Ashford, Washington
  2. 2.1 4 km SW of Wilderness Rim, Washington
  3. 1.7 10 km ESE of Riverbend, Washington
  4. 1.8 3 km SW of Kapowsin, Washington
  5. 2.1 4 km NNE of Snoqualmie, Washington
  6. 1.6 8 km E of Ashford, Washington
  7. 1.6 1 km NNE of Maple Valley, Washington
  8. 1.7 8 km E of Ashford, Washington
  9. 2.4 8 km E of Ashford, Washington
  10. 1.9 6 km SSE of Lea Hill, Washington
  11. 1.7 9 km SE of Enumclaw, Washington
  12. 2.2 23 km ENE of Ashford, Washington
  13. 1.5 5 km WSW of Mercer Island, Washington
  14. 1.5 0 km NNW of Eatonville, Washington
  15. 1.7 1 km SW of Kapowsin, 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.