QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

2 km W of Erlands Point-Kitsap Lake, Washington

· 25 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 8 kmMason County 42 kmIsland County 63 kmJefferson County 63 kmKing County 69 kmThurston County 74 kmPierce County 75 kmSnohomish County 89 kmGrays Harbor County 98 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
25 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 8 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3371 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× 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 47.5952, -122.7393. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 8 km (5 mi) SW of here earthquakes near Kitsap County
Mason County, WA 42 km (26 mi) NE of here earthquakes near Mason County
Island County, WA 63 km (39 mi) S of here earthquakes near Island County
Jefferson County, WA 63 km (39 mi) ESE of here earthquakes near Jefferson County
King County, WA 69 km (43 mi) W of here earthquakes near King County
Thurston County, WA 74 km (46 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

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

  1. 1.7 3 km SSW of Erlands Point-Kitsap Lake, Washington
  2. 1.6 2 km WNW of Navy Yard City, Washington
  3. 1.6 2 km WNW of Navy Yard City, Washington
  4. 1.9 1 km NE of Suquamish, Washington
  5. 1.6 2 km E of Enetai, Washington
  6. 2.7 5 km W of Gorst, Washington
  7. 1.5 3 km ENE of Enetai, Washington
  8. 1.9 0 km SSE of Enetai, Washington
  9. 1.6 3 km NW of Burley, Washington
  10. 1.6 19 km WSW of Brinnon, Washington
  11. 1.7 2 km WNW of Federal Way, Washington
  12. 1.5 3 km SSE of Quilcene, Washington
  13. 1.7 1 km NNE of Lynnwood, Washington
  14. 2.3 10 km NE of Union, Washington
  15. 2.1 5 km ESE 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.1 on 2017-02-23 — it released about 3,200 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.