QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

1 km S of Southworth, Washington

· 27 km deep · released about 9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 19 kmKing County 50 kmMason County 53 kmPierce County 57 kmThurston County 68 kmIsland County 74 kmSnohomish County 83 kmJefferson County 84 kmLewis County 103 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
27 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 568 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 9 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 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.7 about 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 47.5022, -122.5018. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 19 km (12 mi) SE of here earthquakes near Kitsap County
King County, WA 50 km (31 mi) W of here earthquakes near King County
Mason County, WA 53 km (33 mi) ENE of here earthquakes near Mason County
Pierce County, WA 57 km (35 mi) NNW of here earthquakes near Pierce County
Thurston County, WA 68 km (42 mi) NNE of here earthquakes near Thurston County
Island County, WA 74 km (46 mi) S of here earthquakes near Island 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. 1.9 2 km NW of Indianola, Washington
  2. 1.6 3 km SSW of Bethel, Washington
  3. 1.8 4 km N of Belfair, Washington
  4. 1.6 1 km ESE of Issaquah, Washington
  5. 1.8 5 km SSW of Port Ludlow, Washington
  6. 1.7 1 km ESE of Enetai, Washington
  7. 1.5 1 km ENE of Bainbridge Island, Washington
  8. 2.3 0 km E of Enetai, Washington
  9. 1.9 2 km NNE of Esperance, Washington
  10. 2.3 0 km SSW of Boulevard Park, Washington
  11. 1.7 1 km SW of East Port Orchard, Washington
  12. 1.5 1 km N of Boulevard Park, Washington
  13. 1.7 7 km WNW of Burley, Washington
  14. 1.9 2 km SE of Ravensdale, Washington
  15. 1.7 1 km NNE of Tracyton, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.1 on 2017-02-23 — it released about 4,600 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.