QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

1 km E of Poulsbo, Washington

· 22 km deep · released about 180 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 11 kmIsland County 47 kmMason County 59 kmKing County 65 kmJefferson County 68 kmSnohomish County 73 kmPierce County 84 kmThurston County 90 kmSan Juan County 93 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 2.5 (ml)
Depth
22 km below the surface
Felt
6 reports · strongest reported intensity IV
Nearest
Kitsap County, 11 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1481 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 86,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 61,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.4× the energy of this one
  4. This earthquake M 2.5 about 180 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 47.7340, -122.6252. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 11 km (7 mi) N of here earthquakes near Kitsap County
Island County, WA 47 km (29 mi) S of here earthquakes near Island County
Mason County, WA 59 km (37 mi) NE of here earthquakes near Mason County
King County, WA 65 km (41 mi) WNW of here earthquakes near King County
Jefferson County, WA 68 km (42 mi) E of here earthquakes near Jefferson County
Snohomish County, WA 73 km (46 mi) WSW of here earthquakes near Snohomish County

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

Aftershocks so far

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

  1. 1.7 3 km WNW of Gorst, Washington
  2. 1.8 7 km ESE of Blyn, Washington
  3. 1.5 1 km WSW of Silverdale, Washington
  4. 1.5 2 km WNW of Gig Harbor, Washington
  5. 1.8 4 km SSW of Port Ludlow, Washington
  6. 1.6 6 km SW of Des Moines, Washington
  7. 1.9 1 km ESE of Esperance, Washington
  8. 1.7 12 km NNW of Quilcene, Washington
  9. 2.2 1 km NNE of Cathcart, Washington
  10. 1.6 7 km WNW of Gorst, Washington
  11. 1.5 7 km ENE of Allyn, Washington
  12. 1.8 5 km N of Lofall, Washington
  13. 1.9 8 km ENE of Port Townsend, Washington
  14. 1.5 3 km NNE of White Center, Washington
  15. 1.7 1 km NNE of Enetai, 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 4.1 on 2017-02-23 — it released about 230 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.