QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

1 km E of Browns Point, Washington

· 20 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 34 kmKitsap County 41 kmKing County 49 kmThurston County 51 kmMason County 57 kmLewis County 80 kmIsland County 97 kmSnohomish County 97 kmJefferson County 100 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 1.8 (ml)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Pierce County, 34 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2803 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 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× the energy of this one
  4. This earthquake M 1.8 about 13 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, -122.4245. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pierce County, WA 34 km (21 mi) NW of here earthquakes near Pierce County
Kitsap County, WA 41 km (26 mi) SSE of here earthquakes near Kitsap County
King County, WA 49 km (31 mi) WSW of here earthquakes near King County
Thurston County, WA 51 km (32 mi) NE of here earthquakes near Thurston County
Mason County, WA 57 km (35 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 SW of Redmond, Washington
  2. 2.1 1 km NNE of Bainbridge Island, Washington
  3. 2.1 2 km S of Grapeview, Washington
  4. 1.7 3 km ESE of Belfair, Washington
  5. 1.7 2 km NNW of Algona, Washington
  6. 1.9 2 km NNW of Algona, Washington
  7. 1.7 3 km WNW of Belfair, Washington
  8. 1.6 3 km W of Gorst, Washington
  9. 2.1 1 km NNW of Artondale, Washington
  10. 1.7 2 km N of Lakeland South, Washington
  11. 2.7 0 km WSW of Klahanie, Washington
  12. 1.8 3 km E of Home, Washington
  13. 1.8 1 km S of Auburn, Washington
  14. 1.5 2 km S of Black Diamond, Washington
  15. 1.5 5 km SSW of Gorst, 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.