QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

2 km SW of Elk Plain, Washington

· 29 km deep · released about 6.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 20 kmThurston County 33 kmLewis County 51 kmMason County 67 kmKing County 67 kmKitsap County 69 kmCowlitz County 96 kmGrays Harbor County 107 kmWahkiakum County 113 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
29 km below the surface
Felt
no reports yet
Nearest
Pierce County, 20 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2112 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 6.6 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 2,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.6 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 47.0388, -122.4222. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 20 km (13 mi) W of here earthquakes near Pierce County
Thurston County, WA 33 km (21 mi) ENE of here earthquakes near Thurston County
Lewis County, WA 51 km (32 mi) N of here earthquakes near Lewis County
Mason County, WA 67 km (41 mi) ESE of here earthquakes near Mason County
King County, WA 67 km (42 mi) SW of here earthquakes near King County
Kitsap County, WA 69 km (43 mi) SSE of here earthquakes near Kitsap 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 1 km NNE of Lakewood, Washington
  2. 1.9 2 km NE of Tanglewilde-Thompson Place, Washington
  3. 2.0 13 km WSW of Longbranch, Washington
  4. 2.0 6 km NE of Ashford, Washington
  5. 1.9 6 km NE of Ashford, Washington
  6. 2.3 6 km NE of Ashford, Washington
  7. 1.9 14 km WSW of Alder, Washington
  8. 1.5 2 km WNW of Gig Harbor, Washington
  9. 1.6 6 km SW of Des Moines, Washington
  10. 1.5 7 km ENE of Allyn, Washington
  11. 1.6 6 km WSW of La Grande, Washington
  12. 1.7 7 km ESE of Ashford, Washington
  13. 1.6 7 km ESE of Ashford, Washington
  14. 2.3 14 km NNE of Ashford, Washington
  15. 1.8 14 km NNE of Ashford, 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.