QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

11 km E of Tanner, Washington

· 11 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 18 kmPierce County 62 kmSnohomish County 67 kmKittitas County 79 kmKitsap County 81 kmChelan County 86 kmThurston County 110 kmIsland County 112 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 2.8 (ml)
Depth
11 km below the surface
Felt
211 reports · strongest reported intensity III
Measured shaking
intensity II (ShakeMap)
Nearest
King County, 18 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1926 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 211 people have reported feeling it to USGS.

How big was it?

This earthquake released about 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 47.4602, -121.5968. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 18 km (11 mi) E of here earthquakes near King County
Pierce County, WA 62 km (38 mi) NE of here earthquakes near Pierce County
Snohomish County, WA 67 km (42 mi) S of here earthquakes near Snohomish County
Kittitas County, WA 79 km (49 mi) WNW of here earthquakes near Kittitas County
Kitsap County, WA 81 km (51 mi) ESE of here earthquakes near Kitsap County
Chelan County, WA 86 km (53 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

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

  1. 2.1 5 km SW of Black Diamond, Washington
  2. 1.6 6 km SW of Sultan, Washington
  3. 1.6 Washington
  4. 1.5 Washington
  5. 2.0 Washington
  6. 3.1 6 km SSE of Black Diamond, Washington
  7. 1.9 12 km ESE of Enumclaw, Washington
  8. 1.9 2 km E of Union Hill-Novelty Hill, Washington
  9. 1.6 Washington
  10. 1.8 1 km W of Redmond, Washington
  11. 1.6 11 km SSW of Gold Bar, Washington
  12. 1.5 13 km W of Greenwater, Washington
  13. 2.4 7 km ENE of Fall City, Washington
  14. 2.0 7 km NE of Fall City, Washington
  15. 2.0 3 km SE of Issaquah, 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.