QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

44 km WSW of Twisp, Washington

· 5.3 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Chelan County 45 kmOkanogan County 78 kmSnohomish County 82 kmSkagit County 86 kmDouglas County 95 kmWhatcom County 106 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 1.7 (ml)
Depth
5.3 km below the surface
Felt
no reports yet
Nearest
Chelan County, 45 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 705 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 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 48.2618, -120.6995. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Chelan County, WA 45 km (28 mi) N of here earthquakes near Chelan County
Okanogan County, WA 78 km (48 mi) WSW of here earthquakes near Okanogan County
Snohomish County, WA 82 km (51 mi) ENE of here earthquakes near Snohomish County
Skagit County, WA 86 km (54 mi) ESE of here earthquakes near Skagit County
Douglas County, WA 95 km (59 mi) NW of here earthquakes near Douglas County
Whatcom County, WA 106 km (66 mi) SE of here earthquakes near Whatcom 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. 1.6 13 km WSW of Winthrop, Washington
  2. 1.7 23 km NW of Granite Falls, Washington
  3. 1.6 15 km WSW of Methow, 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.