QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

4 km S of Skokomish, Washington

· 42 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mason County 7 kmThurston County 47 kmGrays Harbor County 54 kmKitsap County 55 kmJefferson County 64 kmPierce County 80 kmPacific County 94 kmLewis County 99 kmKing County 102 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
42 km below the surface
Felt
no reports yet
Nearest
Mason County, 7 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2428 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 47.2903, -123.1583. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mason County, WA 7 km (4 mi) S of here earthquakes near Mason County
Thurston County, WA 47 km (29 mi) NNW of here earthquakes near Thurston County
Grays Harbor County, WA 54 km (34 mi) ENE of here earthquakes near Grays Harbor County
Kitsap County, WA 55 km (34 mi) SW of here earthquakes near Kitsap County
Jefferson County, WA 64 km (40 mi) SSE of here earthquakes near Jefferson County
Pierce County, WA 80 km (50 mi) WNW of here earthquakes near Pierce County

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

Aftershocks so far

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

  1. 1.7 3 km WNW of Gorst, Washington
  2. 1.5 2 km WNW of Gig Harbor, Washington
  3. 1.5 14 km ENE of Neilton, Washington
  4. 1.6 7 km WNW of Gorst, Washington
  5. 1.5 7 km ENE of Allyn, Washington
  6. 1.6 22 km NNW of Hoodsport, Washington
  7. 1.7 0 km NNE of Navy Yard City, Washington
  8. 1.9 4 km NE of Home, Washington
  9. 2.1 0 km S of Skokomish, Washington
  10. 2.0 3 km WSW of Home, Washington
  11. 1.6 3 km SSW of Bethel, Washington
  12. 1.8 4 km N of Belfair, Washington
  13. 1.7 1 km SW of East Port Orchard, Washington
  14. 1.7 7 km WNW of Burley, Washington
  15. 1.8 3 km WNW of Navy Yard City, 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 3,600 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.