QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

24 km N of Winthrop, Washington

· 7.3 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Okanogan County 41 kmChelan County 96 kmDouglas County 113 kmSkagit County 117 kmWhatcom 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 1.9 (ml)
Depth
7.3 km below the surface
Felt
no reports yet
Nearest
Okanogan County, 41 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 52 days ago

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

How big was it?

This earthquake released about 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 48.6928, -120.2488. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Okanogan County, WA 41 km (25 mi) WNW of here earthquakes near Okanogan County
Chelan County, WA 96 km (60 mi) NNE of here earthquakes near Chelan County
Douglas County, WA 113 km (70 mi) NNW of here earthquakes near Douglas County
Skagit County, WA 117 km (73 mi) ENE of here earthquakes near Skagit County
Whatcom County, WA 118 km (73 mi) E of here earthquakes near Whatcom County
Snohomish County, WA 133 km (82 mi) ENE of here earthquakes near Snohomish County

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

Aftershocks so far

1 earthquake has been recorded within 50 km since this one.

  1. 1.6 13 km WSW of Winthrop, 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.