QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8ml

3 km WSW of Skokomish, Washington

· 44 km deep · released about 7.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mason County 4 kmThurston County 51 kmGrays Harbor County 52 kmKitsap County 55 kmJefferson County 59 kmPierce County 85 kmPacific County 96 kmIsland County 101 kmClallam 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 3.8 (ml)
Depth
44 km below the surface
Felt
164 reports · strongest reported intensity V
Measured shaking
intensity III (ShakeMap)
Nearest
Mason County, 4 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1085 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 164 people have reported feeling it to USGS.

How big was it?

This earthquake released about 7.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 24,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 760× the energy of this one
  4. This earthquake M 3.8 about 7.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 15× more

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 47.3197, -123.2028. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mason County, WA 4 km (3 mi) SSW of here earthquakes near Mason County
Thurston County, WA 51 km (32 mi) NNW of here earthquakes near Thurston County
Grays Harbor County, WA 52 km (33 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 59 km (37 mi) SSE of here earthquakes near Jefferson County
Pierce County, WA 85 km (53 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. 1.6 8 km WSW of Tumwater, Washington
  2. 3.0 1 km NE of Gorst, Washington
  3. 3.1 Puget Sound region, Washington
  4. 2.1 10 km WNW of Longbranch, Washington
  5. 1.8 Olympic Peninsula, Washington
  6. 1.5 Puget Sound region, Washington
  7. 1.8 4 km S of Seabeck, Washington
  8. 2.1 14 km N of Hoodsport, Washington
  9. 1.7 Puget Sound region, Washington
  10. 2.5 11 km SW of Brinnon, Washington
  11. 2.4 9 km NW of Belfair, Washington
  12. 1.6 12 km ENE of McCleary, Washington
  13. 1.9 2 km NW of Chico, Washington
  14. 2.6 11 km WNW of Hoodsport, Washington
  15. 1.6 3 km W of Belfair, 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 2.9 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.