QuakeIndex

explosion · reviewed by a seismologist

M 1.8ml

7 km ESE of Blyn, Washington

· -0.1 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 25 kmKitsap County 45 kmJefferson County 51 kmSan Juan County 58 kmClallam County 74 kmMason County 75 kmSnohomish County 86 kmSkagit County 98 kmKing County 99 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
-0.1 km below the surface
Felt
no reports yet
Nearest
Island County, 25 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1644 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 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 48.0040, -122.9125. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 25 km (15 mi) SW of here earthquakes near Island County
Kitsap County, WA 45 km (28 mi) NNW of here earthquakes near Kitsap County
Jefferson County, WA 51 km (32 mi) ENE of here earthquakes near Jefferson County
San Juan County, WA 58 km (36 mi) SSE of here earthquakes near San Juan County
Clallam County, WA 74 km (46 mi) E of here earthquakes near Clallam County
Mason County, WA 75 km (47 mi) NNE of here earthquakes near Mason County

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

Aftershocks so far

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

  1. 1.7 1 km NNW of River Road, Washington
  2. 2.3 6 km WSW of Shoreline, Washington
  3. 1.6 4 km W of Bainbridge Island, Washington
  4. 2.0 13 km W of Ault Field, Washington
  5. 1.6 3 km SSE of Quilcene, Washington
  6. 1.5 5 km SW of Port Ludlow, Washington
  7. 1.9 2 km SSW of Esperance, Washington
  8. 1.8 1 km W of Suquamish, Washington
  9. 2.1 3 km SSE of Quilcene, Washington
  10. 1.7 4 km SE of Quilcene, Washington
  11. 1.5 4 km SW of Port Ludlow, Washington
  12. 1.6 4 km ESE of Quilcene, Washington
  13. 2.3 16 km SSE of Friday Harbor, Washington
  14. 1.7 5 km SSE of Quilcene, Washington
  15. 1.5 6 km WSW of Port Ludlow, 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.