QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

4 km WSW of Shoreline, Washington

· 28 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 22 kmIsland County 50 kmKing County 51 kmSnohomish County 59 kmMason County 73 kmPierce County 79 kmJefferson County 84 kmSkagit County 94 kmThurston 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 1.9 (ml)
Depth
28 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Kitsap County, 22 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 320 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 25 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 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 47.7435, -122.4002. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 22 km (14 mi) ENE of here earthquakes near Kitsap County
Island County, WA 50 km (31 mi) SSE of here earthquakes near Island County
King County, WA 51 km (32 mi) WNW of here earthquakes near King County
Snohomish County, WA 59 km (36 mi) SW of here earthquakes near Snohomish County
Mason County, WA 73 km (45 mi) NE of here earthquakes near Mason County
Pierce County, WA 79 km (49 mi) NNW of here earthquakes near Pierce County

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

Aftershocks so far

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

  1. 1.7 5 km NE of Hobart, Washington
  2. 2.2 5 km E of Mirrormont, Washington
  3. 1.8 1 km S of Shoreline, Washington
  4. 2.4 3 km ENE of Belfair, Washington
  5. 1.9 1 km WSW of Manchester, Washington
  6. 2.0 3 km S of Monroe, Washington
  7. 2.0 6 km SW of Clinton, Washington
  8. 1.5 4 km NW of Tulalip Bay, Washington
  9. 2.0 8 km W of Gorst, Washington
  10. 1.6 2 km SSW of Clinton, Washington
  11. 3.0 4 km ESE of Cathcart, Washington
  12. 1.9 0 km SE of Enetai, Washington
  13. 1.7 3 km SSW of Clinton, Washington
  14. 2.0 3 km SSW of Clinton, Washington
  15. 1.6 1 km E of Clyde Hill, 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 4.6 on 2019-07-12 — it released about 9,100 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.