QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

8 km ESE of Carbonado, Washington

· 6.4 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 16 kmKing County 48 kmLewis County 63 kmThurston County 69 kmKitsap County 83 kmKittitas County 96 kmMason County 98 kmSnohomish County 111 kmCowlitz 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 1.8 (ml)
Depth
6.4 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Pierce County, 16 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 502 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 47.0652, -121.9465. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 16 km (10 mi) E of here earthquakes near Pierce County
King County, WA 48 km (30 mi) S of here earthquakes near King County
Lewis County, WA 63 km (39 mi) NNE of here earthquakes near Lewis County
Thurston County, WA 69 km (43 mi) ENE of here earthquakes near Thurston County
Kitsap County, WA 83 km (52 mi) SE of here earthquakes near Kitsap County
Kittitas County, WA 96 km (60 mi) W of here earthquakes near Kittitas County

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

Aftershocks so far

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

  1. 2.5 2 km SE of Buckley, Washington
  2. 1.8 2 km ESE of Buckley, Washington
  3. 2.2 24 km ENE of Ashford, Washington
  4. 1.5 1 km WSW of Kapowsin, Washington
  5. 2.8 3 km NE of Mineral, Washington
  6. 2.2 4 km ESE of Enumclaw, Washington
  7. 1.6 1 km SSE of Kapowsin, Washington
  8. 1.5 0 km SSW of Carbonado, Washington
  9. 1.9 1 km NNW of Maple Valley, Washington
  10. 1.6 5 km SE of Enumclaw, Washington
  11. 1.5 5 km NNE of Dash Point, Washington
  12. 1.8 1 km SE of Kapowsin, Washington
  13. 1.8 16 km SSE of Carbonado, Washington
  14. 1.6 3 km NE of Wilkeson, Washington
  15. 1.5 1 km SE 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.