QuakeIndex

explosion · reviewed by a seismologist

M 1.5ml

Washington

· -1.0 km deep · released about 5.9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Douglas County 13 kmChelan County 61 kmGrant County 73 kmOkanogan County 80 kmKittitas County 102 kmLincoln County 107 kmFerry County 118 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 1.5 (ml)
Depth
-1.0 km below the surface
Felt
no reports yet
Nearest
Douglas County, 13 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1242 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 47.8308, -119.8050. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Douglas County, WA 13 km (8 mi) NW of here earthquakes near Douglas County
Chelan County, WA 61 km (38 mi) E of here earthquakes near Chelan County
Grant County, WA 73 km (45 mi) NNW of here earthquakes near Grant County
Okanogan County, WA 80 km (50 mi) S of here earthquakes near Okanogan County
Kittitas County, WA 102 km (64 mi) NE of here earthquakes near Kittitas County
Lincoln County, WA 107 km (67 mi) WNW of here earthquakes near Lincoln County

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

Aftershocks so far

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

  1. 0.9 5 km ENE of Entiat, Washington
  2. 2.3 4 km NW of Waterville, Washington
  3. 1.7 7 km WSW of Chelan, Washington
  4. 1.9 10 km SSW of Granite Falls, Washington
  5. 1.5 7 km SSE of Chelan Falls, Washington
  6. 1.8 12 km WNW of Mansfield, Washington
  7. 1.6 13 km E of Waterville, Washington
  8. 1.8 7 km W of Entiat, Washington
  9. 2.5 4 km NW of Waterville, Washington
  10. 1.6 15 km WSW of Methow, Washington
  11. 2.4 5 km SSW of Chelan Falls, Washington
  12. 1.8 2 km NNE of Entiat, Washington
  13. 2.6 10 km WNW of Entiat, Washington
  14. 1.7 7 km W of Entiat, Washington
  15. 2.1 8 km S of Entiat, 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.