QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

5 km ENE of Tanner, Washington

· 15 km deep · released about 110 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 11 kmPierce County 61 kmSnohomish County 63 kmKitsap County 74 kmKittitas County 86 kmChelan County 90 kmIsland County 104 kmThurston County 106 kmSkagit County 111 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
15 km below the surface
Felt
4 reports · strongest reported intensity V
Nearest
King County, 11 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 586 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 110 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 95,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.5× the energy of this one
  4. This earthquake M 2.4 about 110 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 47.4943, -121.6860. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
King County, WA 11 km (7 mi) E of here earthquakes near King County
Pierce County, WA 61 km (38 mi) NE of here earthquakes near Pierce County
Snohomish County, WA 63 km (39 mi) S of here earthquakes near Snohomish County
Kitsap County, WA 74 km (46 mi) ESE of here earthquakes near Kitsap County
Kittitas County, WA 86 km (54 mi) WNW of here earthquakes near Kittitas County
Chelan County, WA 90 km (56 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

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

  1. 1.7 4 km S of Monroe, Washington
  2. 1.6 9 km ENE of Snoqualmie, Washington
  3. 2.2 4 km ESE of Enumclaw, Washington
  4. 2.1 10 km NNE of Snoqualmie, Washington
  5. 1.9 1 km NNW of Maple Valley, Washington
  6. 1.6 5 km SE of Enumclaw, Washington
  7. 2.8 3 km NE of Fall City, Washington
  8. 1.6 3 km NE of Wilkeson, Washington
  9. 1.6 3 km WSW of Sammamish, Washington
  10. 1.9 1 km SSE of Echo Lake, Washington
  11. 2.3 7 km NE of Snoqualmie, Washington
  12. 2.2 2 km SSE of Lake Marcel-Stillwater, Washington
  13. 1.6 4 km WSW of Wilderness Rim, Washington
  14. 2.1 4 km E of Enumclaw, Washington
  15. 1.5 2 km ENE of Woods Creek, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2019-07-12 — it released about 2,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.