QuakeIndex

explosion · reviewed by a seismologist

M 1.6ml

5 km SW of Port Ludlow, Washington

· -0.0 km deep · released about 7.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 28 kmIsland County 31 kmJefferson County 60 kmMason County 68 kmSnohomish County 74 kmSan Juan County 75 kmKing County 80 kmClallam County 90 kmSkagit County 96 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 1.6 (ml)
Depth
-0.0 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 28 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1511 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 7.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 7.8 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 47.8822, -122.7305. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 28 km (17 mi) NNW of here earthquakes near Kitsap County
Island County, WA 31 km (19 mi) S of here earthquakes near Island County
Jefferson County, WA 60 km (37 mi) E of here earthquakes near Jefferson County
Mason County, WA 68 km (42 mi) NNE of here earthquakes near Mason County
Snohomish County, WA 74 km (46 mi) WSW of here earthquakes near Snohomish County
San Juan County, WA 75 km (46 mi) SSE of here earthquakes near San Juan County

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

Aftershocks so far

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

  1. 1.9 4 km SW of Port Ludlow, Washington
  2. 1.6 3 km W of Belfair, Washington
  3. 1.6 3 km SSE of Quilcene, Washington
  4. 1.7 5 km SW of Port Ludlow, Washington
  5. 2.0 3 km N of White Center, Washington
  6. 1.7 1 km NNW of River Road, Washington
  7. 2.3 6 km WSW of Shoreline, Washington
  8. 1.6 4 km W of Bainbridge Island, Washington
  9. 1.6 2 km NE of Esperance, Washington
  10. 1.6 3 km SSE of Quilcene, Washington
  11. 1.7 4 km NNW of White Center, Washington
  12. 1.7 2 km SSW of Gorst, Washington
  13. 1.5 5 km SW of Port Ludlow, Washington
  14. 1.9 2 km SSW of Esperance, Washington
  15. 1.8 1 km W of Suquamish, 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

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