QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

4 km WSW of Seabeck, Washington

· 16 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 18 kmMason County 37 kmJefferson County 53 kmIsland County 62 kmThurston County 76 kmKing County 80 kmPierce County 84 kmGrays Harbor County 91 kmClallam County 93 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 2.1 (ml)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 18 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2831 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 47.6200, -122.8817. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 18 km (11 mi) W of here earthquakes near Kitsap County
Mason County, WA 37 km (23 mi) NE of here earthquakes near Mason County
Jefferson County, WA 53 km (33 mi) ESE of here earthquakes near Jefferson County
Island County, WA 62 km (38 mi) SSW of here earthquakes near Island County
Thurston County, WA 76 km (47 mi) N of here earthquakes near Thurston County
King County, WA 80 km (50 mi) W of here earthquakes near King 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. 1.5 27 km NNW of Hoodsport, Washington
  2. 1.7 4 km S of Skokomish, Washington
  3. 2.0 6 km ESE of Quilcene, Washington
  4. 2.1 1 km NNE of Bainbridge Island, Washington
  5. 2.1 2 km S of Grapeview, Washington
  6. 1.7 3 km ESE of Belfair, Washington
  7. 1.5 5 km SE of Port Ludlow, Washington
  8. 1.7 12 km SW of Seabeck, Washington
  9. 1.7 3 km WNW of Belfair, Washington
  10. 1.9 4 km W of Hansville, Washington
  11. 1.6 3 km W of Gorst, Washington
  12. 2.1 1 km NNW of Artondale, Washington
  13. 1.8 3 km E of Home, Washington
  14. 1.6 4 km NNW of Lofall, Washington
  15. 1.5 5 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.1 on 2017-02-23 — it released about 970 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.