QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

0 km ESE of Riverton, Washington

· 25 km deep · released about 150 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 32 kmKing County 34 kmPierce County 49 kmMason County 68 kmThurston County 73 kmSnohomish County 75 kmIsland County 80 kmJefferson County 99 kmLewis County 101 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 2.5 (ml)
Depth
25 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Kitsap County, 32 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2904 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 150 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 72,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.5× the energy of this one
  4. This earthquake M 2.5 about 150 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 47.4835, -122.2913. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 32 km (20 mi) ESE of here earthquakes near Kitsap County
King County, WA 34 km (21 mi) W of here earthquakes near King County
Pierce County, WA 49 km (31 mi) NNW of here earthquakes near Pierce County
Mason County, WA 68 km (42 mi) ENE of here earthquakes near Mason County
Thurston County, WA 73 km (46 mi) NNE of here earthquakes near Thurston County
Snohomish County, WA 75 km (46 mi) SSW of here earthquakes near Snohomish County

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

Aftershocks so far

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

  1. 2.3 0 km ESE of Riverton, Washington
  2. 1.9 11 km ESE of Enumclaw, Washington
  3. 1.6 4 km WSW of Monroe, Washington
  4. 1.9 0 km SE of Normandy Park, Washington
  5. 1.8 1 km NE of Normandy Park, Washington
  6. 1.6 0 km E of Normandy Park, Washington
  7. 2.3 1 km NNE of Enetai, Washington
  8. 1.6 3 km W of Federal Way, Washington
  9. 2.0 4 km SSW of Roosevelt, Washington
  10. 1.7 8 km SSW of Wilderness Rim, Washington
  11. 2.6 8 km SSW of Wilderness Rim, Washington
  12. 2.0 10 km ENE of Fall City, Washington
  13. 1.8 1 km E of Browns Point, Washington
  14. 2.0 1 km NNE of Silver Firs, Washington
  15. 1.7 6 km W of Lofall, 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.