QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Puget Sound region, Washington

· 25 km deep · released about 8.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mason County 19 kmThurston County 41 kmKitsap County 43 kmPierce County 65 kmGrays Harbor County 71 kmJefferson County 72 kmKing County 85 kmLewis County 90 kmIsland County 97 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 1.6 (ml)
Depth
25 km below the surface
Felt
no reports yet
Nearest
Mason County, 19 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2329 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 8.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 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 1.6 about 8.7 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 47.3008, -122.9255. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mason County, WA 19 km (12 mi) ESE of here earthquakes near Mason County
Thurston County, WA 41 km (26 mi) N of here earthquakes near Thurston County
Kitsap County, WA 43 km (27 mi) SSW of here earthquakes near Kitsap County
Pierce County, WA 65 km (40 mi) WNW of here earthquakes near Pierce County
Grays Harbor County, WA 71 km (44 mi) ENE of here earthquakes near Grays Harbor County
Jefferson County, WA 72 km (45 mi) SE of here earthquakes near Jefferson County

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

Aftershocks so far

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

  1. 2.5 1 km E of Bethel, Washington
  2. 1.7 Puget Sound region, Washington
  3. 1.6 11 km S of Shelton, Washington
  4. 1.7 4 km SSE of Bainbridge Island, Washington
  5. 2.2 5 km SE of Bainbridge Island, Washington
  6. 1.5 2 km ENE of Enetai, Washington
  7. 2.3 1 km SSE of Enetai, Washington
  8. 1.7 26 km NW of Hoodsport, Washington
  9. 1.6 5 km WNW of DuPont, Washington
  10. 1.8 3 km W of Navy Yard City, Washington
  11. 2.0 3 km NNE of Southworth, Washington
  12. 1.7 4 km SSW of Bethel, Washington
  13. 1.6 10 km SW of Brinnon, Washington
  14. 2.0 0 km N of Enetai, Washington
  15. 1.8 1 km SW of Enetai, 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 4,700 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.