QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

8 km SW of Skokomish, Washington

· 42 km deep · released about 430 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mason County 10 kmGrays Harbor County 48 kmThurston County 50 kmKitsap County 60 kmJefferson County 62 kmPierce County 87 kmPacific County 90 kmLewis County 102 kmClallam County 104 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 2.8 (ml)
Depth
42 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Mason County, 10 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2706 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 430 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 35,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 25,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.2× the energy of this one
  4. This earthquake M 2.8 about 430 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 47.2822, -123.2488. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mason County, WA 10 km (6 mi) SW of here earthquakes near Mason County
Grays Harbor County, WA 48 km (30 mi) ENE of here earthquakes near Grays Harbor County
Thurston County, WA 50 km (31 mi) NW of here earthquakes near Thurston County
Kitsap County, WA 60 km (37 mi) SW of here earthquakes near Kitsap County
Jefferson County, WA 62 km (38 mi) SSE of here earthquakes near Jefferson County
Pierce County, WA 87 km (54 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

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

  1. 1.9 4 km NE of Home, Washington
  2. 2.1 0 km S of Skokomish, Washington
  3. 2.0 3 km WSW of Home, Washington
  4. 1.8 4 km N of Belfair, Washington
  5. 1.7 7 km WNW of Burley, Washington
  6. 1.9 6 km WNW of Hoodsport, Washington
  7. 3.2 3 km W of Skokomish, Washington
  8. 2.0 4 km E of Home, Washington
  9. 3.8 3 km WSW of Skokomish, Washington
  10. 1.6 12 km S of Shelton, Washington
  11. 1.6 3 km SSW of Aberdeen Gardens, Washington
  12. 1.6 10 km S of Shelton, Washington
  13. 1.6 11 km S of Shelton, Washington
  14. 1.7 26 km NW of Hoodsport, Washington
  15. 1.6 10 km SW of Brinnon, 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 95 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.