QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

2 km NNW of Algona, Washington

· 21 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 29 kmKing County 39 kmKitsap County 48 kmThurston County 59 kmMason County 69 kmLewis County 80 kmSnohomish County 92 kmIsland County 100 kmJefferson County 110 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 1.9 (ml)
Depth
21 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Pierce County, 29 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2005 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 790,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 560,000× the energy of this one
  3. Around the size people start to feel M 3.0 50× the energy of this one
  4. This earthquake M 1.9 about 19 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 47.2990, -122.2657. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 29 km (18 mi) NNW of here earthquakes near Pierce County
King County, WA 39 km (24 mi) WSW of here earthquakes near King County
Kitsap County, WA 48 km (30 mi) SE of here earthquakes near Kitsap County
Thurston County, WA 59 km (37 mi) NE of here earthquakes near Thurston County
Mason County, WA 69 km (43 mi) E of here earthquakes near Mason County
Lewis County, WA 80 km (50 mi) N of here earthquakes near Lewis County

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

Aftershocks so far

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

  1. 1.9 3 km N of White Center, Washington
  2. 1.6 Puget Sound region, Washington
  3. 1.5 6 km NW of Gorst, Washington
  4. 1.8 4 km SSW of Erlands Point-Kitsap Lake, Washington
  5. 1.7 12 km W of Greenwater, Washington
  6. 1.8 5 km W of Wilderness Rim, Washington
  7. 1.9 1 km SSE of Parkwood, Washington
  8. 2.3 4 km NNW of Lakeland North, Washington
  9. 1.6 3 km ESE of Klahanie, Washington
  10. 2.7 2 km S of Ravensdale, Washington
  11. 1.7 3 km WNW of Wauna, Washington
  12. 1.8 10 km ESE of Enumclaw, Washington
  13. 2.0 3 km SW of Wilderness Rim, Washington
  14. 2.1 1 km SW of Home, Washington
  15. 2.4 1 km SSW of Home, 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.