QuakeIndex

explosion · reviewed by a seismologist

M 1.9ml

28 km SSW of Sooke, Canada

· -0.4 km deep · released about 18 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Clallam County 3 kmJefferson County 45 kmSan Juan County 70 kmIsland County 90 kmMason County 102 kmKitsap County 107 kmGrays Harbor County 114 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 1.9 (ml)
Depth
-0.4 km below the surface
Felt
no reports yet
Nearest
Clallam County, 3 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2160 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 18 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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 48.1397, -123.8768. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Clallam County, WA 3 km (2 mi) NNE of here earthquakes near Clallam County
Jefferson County, WA 45 km (28 mi) NW of here earthquakes near Jefferson County
San Juan County, WA 70 km (44 mi) SW of here earthquakes near San Juan County
Island County, WA 90 km (56 mi) W of here earthquakes near Island County
Mason County, WA 102 km (64 mi) NNW of here earthquakes near Mason County
Kitsap County, WA 107 km (67 mi) WNW of here earthquakes near Kitsap County

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

Aftershocks so far

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

  1. 1.8 10 km S of Victoria, Canada
  2. 2.3 5 km SSE of Esquimalt, Canada
  3. 2.9 8 km SW of Port Angeles, Washington
  4. 1.5 1 km NNW of Port Angeles East, Washington
  5. 3.7 17 km NNW of Sekiu, Washington
  6. 1.9 5 km NNE of Port Angeles, Washington
  7. 1.6 31 km NNW of Amanda Park, Washington
  8. 1.7 2 km NE of Six Mile, Canada
  9. 1.6 2 km WSW of Forks, Washington
  10. 2.5 8 km ESE of Forks, Washington
  11. 1.9 10 km E of Forks, Washington
  12. 2.3 1 km NNE of Esquimalt, Canada
  13. 2.5 15 km ESE of Forks, Washington
  14. 1.7 14 km ESE of Forks, Washington
  15. 1.6 1 km SE of Six Mile, Canada

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.