QuakeIndex

Earthquake · automatic estimate, may change

M 2.2ml

3 km NNE of Grand Mound, Washington

· 36 km deep · released about 55 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Thurston County 18 kmLewis County 53 kmMason County 61 kmWahkiakum County 67 kmPacific County 67 kmPierce County 68 kmGrays Harbor County 72 kmCowlitz County 73 kmKitsap County 95 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 2.2 (ml)
Depth
36 km below the surface
Felt
no reports yet
Nearest
Thurston County, 18 km NE
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 419 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 55 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 280,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 190,000× the energy of this one
  3. Around the size people start to feel M 3.0 17× the energy of this one
  4. This earthquake M 2.2 about 55 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 46.8177, -122.9865. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Thurston County, WA 18 km (11 mi) SW of here earthquakes near Thurston County
Lewis County, WA 53 km (33 mi) WNW of here earthquakes near Lewis County
Mason County, WA 61 km (38 mi) SSE of here earthquakes near Mason County
Wahkiakum County, WA 67 km (42 mi) NNE of here earthquakes near Wahkiakum County
Pacific County, WA 67 km (42 mi) ENE of here earthquakes near Pacific County
Pierce County, WA 68 km (43 mi) WSW of here earthquakes near Pierce County

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

Aftershocks so far

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

  1. 1.0 6 km SE of McCleary, Washington
  2. 0.7 9 km SSE of Shelton, Washington
  3. 1.2 12 km S of Rainier, Washington
  4. 1.7 6 km W of Mossyrock, Washington
  5. 1.6 6 km NE of Rochester, Washington
  6. 1.5 6 km NW of Winlock, Washington
  7. 1.7 1 km E of Oakville, Washington
  8. 1.6 5 km W of Tumwater, Washington
  9. 2.0 3 km NNE of Winlock, Washington
  10. 1.8 4 km NW of Winlock, Washington
  11. 1.6 12 km SW of Mossyrock, Washington
  12. 1.8 7 km NNW of Pe Ell, Washington
  13. 1.6 11 km S of Shelton, Washington
  14. 1.6 4 km SSW of Shelton, Washington
  15. 1.5 11 km S of Shelton, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.