QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

3 km NE of Southworth, Washington

· 11 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 19 kmKing County 47 kmMason County 57 kmPierce County 58 kmIsland County 71 kmThurston County 72 kmSnohomish County 78 kmJefferson County 85 kmLewis 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
11 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 19 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2859 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 11 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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 47.5330, -122.4600. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 19 km (12 mi) SE of here earthquakes near Kitsap County
King County, WA 47 km (29 mi) W of here earthquakes near King County
Mason County, WA 57 km (36 mi) ENE of here earthquakes near Mason County
Pierce County, WA 58 km (36 mi) NNW of here earthquakes near Pierce County
Island County, WA 71 km (44 mi) SSE of here earthquakes near Island County
Thurston County, WA 72 km (45 mi) NNE of here earthquakes near Thurston County

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

Aftershocks so far

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

  1. 1.9 4 km SSW of Roosevelt, Washington
  2. 2.5 3 km W of Monroe, Washington
  3. 2.0 4 km WNW of Gorst, Washington
  4. 1.6 3 km ENE of Cathcart, Washington
  5. 2.3 4 km SSW of Roosevelt, Washington
  6. 1.7 5 km N of Belfair, Washington
  7. 1.6 4 km E of Cathcart, Washington
  8. 2.0 4 km E of Cathcart, Washington
  9. 1.8 3 km SSW of Roosevelt, Washington
  10. 1.7 3 km SSW of Roosevelt, Washington
  11. 1.8 4 km SSW of Roosevelt, Washington
  12. 3.5 3 km SSW of Roosevelt, Washington
  13. 1.6 6 km WNW of DuPont, Washington
  14. 2.0 7 km WSW of Grapeview, Washington
  15. 1.5 3 km SSW of Gorst, 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.