QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

11 km E of Greenwater, Washington

· 9.1 km deep · released about 23 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 43 kmPierce County 51 kmKittitas County 63 kmLewis County 94 kmYakima County 99 kmSnohomish County 100 kmKitsap County 101 kmChelan County 101 kmThurston County 104 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 1.9 (ml)
Depth
9.1 km below the surface
Felt
no reports yet
Nearest
King County, 43 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 573 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 23 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 660,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 470,000× the energy of this one
  3. Around the size people start to feel M 3.0 42× the energy of this one
  4. This earthquake M 1.9 about 23 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 47.1730, -121.5048. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 43 km (27 mi) SE of here earthquakes near King County
Pierce County, WA 51 km (32 mi) ENE of here earthquakes near Pierce County
Kittitas County, WA 63 km (39 mi) W of here earthquakes near Kittitas County
Lewis County, WA 94 km (58 mi) NE of here earthquakes near Lewis County
Yakima County, WA 99 km (61 mi) NW of here earthquakes near Yakima County
Snohomish County, WA 100 km (62 mi) SSE of here earthquakes near Snohomish County

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

Aftershocks so far

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

  1. 2.2 4 km ESE of Enumclaw, Washington
  2. 1.9 1 km NNW of Maple Valley, Washington
  3. 1.6 5 km SE of Enumclaw, Washington
  4. 1.8 16 km SSE of Carbonado, Washington
  5. 1.6 3 km NE of Wilkeson, Washington
  6. 1.6 17 km NNE of Ashford, Washington
  7. 2.3 7 km NE of Snoqualmie, Washington
  8. 2.2 24 km ENE of Ashford, Washington
  9. 1.9 23 km ENE of Ashford, Washington
  10. 1.5 22 km ENE of Ashford, Washington
  11. 1.7 24 km ENE of Ashford, Washington
  12. 1.9 22 km ENE of Ashford, Washington
  13. 1.6 23 km ENE of Ashford, Washington
  14. 2.0 22 km ENE of Ashford, Washington
  15. 1.6 4 km WSW of Wilderness Rim, 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.