QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

16 km SSE of Carbonado, Washington

· 12 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 19 kmLewis County 51 kmKing County 62 kmThurston County 65 kmKitsap County 93 kmCowlitz County 99 kmKittitas County 100 kmMason County 102 kmSkamania County 102 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
12 km below the surface
Felt
no reports yet
Nearest
Pierce County, 19 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 414 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 13 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 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× the energy of this one
  4. This earthquake M 1.8 about 13 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 46.9412, -121.9685. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 19 km (12 mi) SE of here earthquakes near Pierce County
Lewis County, WA 51 km (32 mi) NE of here earthquakes near Lewis County
King County, WA 62 km (38 mi) S of here earthquakes near King County
Thurston County, WA 65 km (41 mi) E of here earthquakes near Thurston County
Kitsap County, WA 93 km (58 mi) SSE of here earthquakes near Kitsap County
Cowlitz County, WA 99 km (62 mi) NNE of here earthquakes near Cowlitz County

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

Aftershocks so far

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

  1. 1.6 3 km ESE of Buckley, Washington
  2. 1.6 3 km S of Packwood, Washington
  3. 1.6 1 km SSE of Kapowsin, Washington
  4. 1.7 12 km ESE of Enumclaw, Washington
  5. 1.5 11 km NNE of Ashford, Washington
  6. 1.6 9 km S of Lake Morton-Berrydale, Washington
  7. 1.7 1 km ESE of Tacoma, Washington
  8. 1.5 2 km SSE of Kapowsin, Washington
  9. 2.0 5 km WSW of Crocker, Washington
  10. 1.7 1 km SE of Kapowsin, Washington
  11. 2.0 10 km ESE of Ashford, Washington
  12. 1.5 10 km ESE of Enumclaw, Washington
  13. 1.9 4 km SW of Packwood, Washington
  14. 1.5 2 km WNW of Kapowsin, Washington
  15. 1.5 14 km SSW of Alder, 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.