QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

12 km SW of Seabeck, Washington

· 19 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 24 kmMason County 30 kmJefferson County 49 kmIsland County 68 kmThurston County 72 kmGrays Harbor County 83 kmPierce County 85 kmKing County 85 kmClallam County 91 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
19 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 24 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 565 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 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 970,000× the energy of this one
  3. Around the size people start to feel M 3.0 86× 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 47.5785, -122.9620. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 24 km (15 mi) WSW of here earthquakes near Kitsap County
Mason County, WA 30 km (19 mi) NNE of here earthquakes near Mason County
Jefferson County, WA 49 km (31 mi) ESE of here earthquakes near Jefferson County
Island County, WA 68 km (42 mi) SSW of here earthquakes near Island County
Thurston County, WA 72 km (45 mi) N of here earthquakes near Thurston County
Grays Harbor County, WA 83 km (52 mi) NE of here earthquakes near Grays Harbor County

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

Aftershocks so far

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

  1. 1.7 3 km ENE of Enetai, Washington
  2. 1.5 2 km NNW of Manchester, Washington
  3. 2.2 1 km E of Enetai, Washington
  4. 1.8 Puget Sound region, Washington
  5. 1.9 0 km N of Vaughn, Washington
  6. 1.5 5 km W of Gorst, Washington
  7. 2.4 0 km NE of Enetai, Washington
  8. 2.0 2 km NE of Enetai, Washington
  9. 1.7 3 km SW of Bainbridge Island, Washington
  10. 1.6 2 km SSE of Bainbridge Island, Washington
  11. 1.5 2 km NE of Enetai, Washington
  12. 1.6 3 km SSW of Bainbridge Island, Washington
  13. 1.9 1 km ENE of Enetai, Washington
  14. 3.2 0 km NNE of Enetai, Washington
  15. 1.5 5 km WSW of Shelton, 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 3,700 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.