QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

4 km WSW of Mercer Island, Washington

· 2.5 km deep · released about 330 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 30 kmKing County 34 kmPierce County 56 kmSnohomish County 67 kmMason County 71 kmIsland County 74 kmThurston County 81 kmJefferson County 98 kmLewis County 108 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 2.7 (ml)
Depth
2.5 km below the surface
Felt
324 reports · strongest reported intensity III
Nearest
Kitsap County, 30 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 554 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 324 people have reported feeling it to USGS.

How big was it?

This earthquake released about 330 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 46,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 33,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.9× the energy of this one
  4. This earthquake M 2.7 about 330 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 47.5528, -122.2722. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 30 km (19 mi) ESE of here earthquakes near Kitsap County
King County, WA 34 km (21 mi) WNW of here earthquakes near King County
Pierce County, WA 56 km (35 mi) N of here earthquakes near Pierce County
Snohomish County, WA 67 km (42 mi) SW of here earthquakes near Snohomish County
Mason County, WA 71 km (44 mi) ENE of here earthquakes near Mason County
Island County, WA 74 km (46 mi) SSE of here earthquakes near Island 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. 1.7 3 km NE of Southworth, Washington
  2. 1.8 4 km SW of Clinton, Washington
  3. 1.8 2 km SE of Manchester, Washington
  4. 2.1 4 km ENE of Dash Point, Washington
  5. 1.7 2 km SSE of Manchester, Washington
  6. 1.6 2 km SE of Manchester, Washington
  7. 1.6 2 km NE of Shoreline, Washington
  8. 2.8 2 km NNW of Fircrest, Washington
  9. 1.7 1 km SE of Keyport, Washington
  10. 1.5 3 km SSE of Des Moines, Washington
  11. 1.8 3 km S of Suquamish, Washington
  12. 2.1 6 km E of Carnation, Washington
  13. 1.6 4 km NE of Bainbridge Island, Washington
  14. 1.5 2 km ESE of Manchester, Washington
  15. 1.9 3 km E of Indianola, 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.