QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

10 km WNW of Entiat, Washington

· 3.1 km deep · released about 610 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Chelan County 27 kmDouglas County 48 kmKittitas County 70 kmGrant County 85 kmOkanogan County 103 kmSnohomish County 113 kmKing County 115 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 2.9 (ml)
Depth
3.1 km below the surface
Felt
32 reports · strongest reported intensity IV
Measured shaking
intensity II (ShakeMap)
Nearest
Chelan County, 27 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2262 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 32 people have reported feeling it to USGS.

How big was it?

This earthquake released about 610 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 25,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 18,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.6× the energy of this one
  4. This earthquake M 2.9 about 610 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 47.7078, -120.3353. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Chelan County, WA 27 km (17 mi) SE of here earthquakes near Chelan County
Douglas County, WA 48 km (30 mi) W of here earthquakes near Douglas County
Kittitas County, WA 70 km (43 mi) NNE of here earthquakes near Kittitas County
Grant County, WA 85 km (53 mi) NW of here earthquakes near Grant County
Okanogan County, WA 103 km (64 mi) SSW of here earthquakes near Okanogan County
Snohomish County, WA 113 km (70 mi) ESE of here earthquakes near Snohomish County

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

Aftershocks so far

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

  1. 1.6 12 km W of Entiat, Washington
  2. 1.9 10 km SSW of Granite Falls, Washington
  3. 1.7 23 km NW of Granite Falls, Washington
  4. 1.5 7 km SSE of Chelan Falls, Washington
  5. 1.8 12 km WNW of Mansfield, Washington
  6. 1.6 13 km E of Waterville, Washington
  7. 1.8 7 km W of Entiat, Washington
  8. 2.5 4 km NW of Waterville, Washington
  9. 1.6 15 km WSW of Methow, Washington
  10. 2.4 5 km SSW of Chelan Falls, Washington
  11. 1.8 2 km NNE of Entiat, Washington
  12. 2.6 10 km WNW of Entiat, Washington
  13. 1.7 7 km W of Entiat, Washington
  14. 2.1 8 km S of Entiat, Washington
  15. 1.6 5 km NW of Waterville, 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.