QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

5 km SW of Wilderness Rim, Washington

· 19 km deep · released about 120 lb of TNT

10 km30 km60 km120 km N King County 8 kmPierce County 48 kmKitsap County 67 kmSnohomish County 71 kmKittitas County 92 kmThurston County 93 kmMason County 102 kmLewis County 102 kmChelan County 103 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 2.4 (ml)
Depth
19 km below the surface
Felt
10 reports · strongest reported intensity II
Nearest
King County, 8 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 6 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 10 people have reported feeling it to USGS.

How big was it?

This earthquake released about 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 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 47.4187, -121.8222. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 8 km (5 mi) S of here earthquakes near King County
Pierce County, WA 48 km (30 mi) NNE of here earthquakes near Pierce County
Kitsap County, WA 67 km (42 mi) ESE of here earthquakes near Kitsap County
Snohomish County, WA 71 km (44 mi) S of here earthquakes near Snohomish County
Kittitas County, WA 92 km (57 mi) WNW of here earthquakes near Kittitas County
Thurston County, WA 93 km (58 mi) NE of here earthquakes near Thurston County

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

Aftershocks so far

3 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

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.