QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

7 km E of Tanner, Washington

· 16 km deep · released about 47 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 14 kmPierce County 60 kmSnohomish County 65 kmKitsap County 77 kmKittitas County 83 kmChelan County 89 kmThurston County 107 kmIsland County 108 kmLewis County 114 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
16 km below the surface
Felt
4 reports · strongest reported intensity II
Nearest
King County, 14 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 124 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 47 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 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 47.4735, -121.6517. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 14 km (9 mi) E of here earthquakes near King County
Pierce County, WA 60 km (37 mi) NE of here earthquakes near Pierce County
Snohomish County, WA 65 km (41 mi) S of here earthquakes near Snohomish County
Kitsap County, WA 77 km (48 mi) ESE of here earthquakes near Kitsap County
Kittitas County, WA 83 km (52 mi) WNW of here earthquakes near Kittitas County
Chelan County, WA 89 km (55 mi) WSW of here earthquakes near Chelan County

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

Aftershocks so far

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

  1. 1.2 1 km NW of Lake Marcel-Stillwater, Washington
  2. 2.1 10 km ENE of Fall City, Washington
  3. 1.0 5 km WSW of Wilderness Rim, Washington
  4. 2.4 5 km SW of Wilderness Rim, Washington
  5. 1.1 2 km NW of Lake Marcel-Stillwater, Washington
  6. 0.8 4 km E of Carnation, Washington
  7. 2.0 3 km ESE of East Renton Highlands, Washington
  8. 0.5 2 km S of Union Hill-Novelty Hill, Washington
  9. 2.1 4 km SW of Wilderness Rim, Washington
  10. 1.7 10 km ESE of Riverbend, Washington
  11. 2.1 4 km NNE of Snoqualmie, Washington
  12. 1.6 1 km NNE of Maple Valley, Washington
  13. 1.7 2 km NNE of May Creek, Washington
  14. 1.5 5 km SSW of Monroe, Washington
  15. 1.5 2 km WNW of Ames Lake, 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.