QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

2 km ENE of Seabeck, Washington

· 18 km deep · released about 460 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 11 kmMason County 44 kmIsland County 58 kmJefferson County 58 kmKing County 74 kmThurston County 79 kmPierce County 82 kmSnohomish County 89 kmClallam County 97 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 2.8 (ml)
Depth
18 km below the surface
Felt
14 reports · strongest reported intensity III
Measured shaking
intensity II (ShakeMap)
Nearest
Kitsap County, 11 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3175 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 14 people have reported feeling it to USGS.

How big was it?

This earthquake released about 460 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 33,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 23,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.1× the energy of this one
  4. This earthquake M 2.8 about 460 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 47.6448, -122.7910. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 11 km (7 mi) W of here earthquakes near Kitsap County
Mason County, WA 44 km (27 mi) NE of here earthquakes near Mason County
Island County, WA 58 km (36 mi) S of here earthquakes near Island County
Jefferson County, WA 58 km (36 mi) ESE of here earthquakes near Jefferson County
King County, WA 74 km (46 mi) WNW of here earthquakes near King County
Thurston County, WA 79 km (49 mi) N of here earthquakes near Thurston County

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

Aftershocks so far

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

  1. 1.9 6 km SSE of Port Ludlow, Washington
  2. 2.0 1 km SE of Keyport, Washington
  3. 1.9 1 km WSW of Freeland, Washington
  4. 1.6 1 km ENE of Enetai, Washington
  5. 1.7 2 km NNE of Southworth, Washington
  6. 1.5 8 km SW of Grapeview, Washington
  7. 1.5 1 km SSE of Keyport, Washington
  8. 1.6 3 km SE of Gorst, Washington
  9. 2.3 1 km SE of Keyport, Washington
  10. 1.9 1 km ESE of Keyport, Washington
  11. 1.6 3 km NW of Suquamish, Washington
  12. 2.5 0 km ESE of Riverton, Washington
  13. 1.5 1 km N of Artondale, Washington
  14. 2.0 12 km WNW of Belfair, Washington
  15. 1.6 6 km NE of Lofall, 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 89 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.