QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

8 km WNW of Carlsborg, WA

· 42 km deep · released about 550 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Jefferson County 41 kmSan Juan County 44 kmIsland County 44 kmClallam County 46 kmKitsap County 71 kmMason County 86 kmSnohomish County 112 kmSkagit County 115 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
42 km below the surface
Felt
17 reports · strongest reported intensity II
Nearest
Jefferson County, 41 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2732 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 17 people have reported feeling it to USGS.

How big was it?

This earthquake released about 550 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 28,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.8 about 550 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 48.1257, -123.2643. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Jefferson County, WA 41 km (25 mi) NNE of here earthquakes near Jefferson County
San Juan County, WA 44 km (27 mi) SSW of here earthquakes near San Juan County
Island County, WA 44 km (27 mi) W of here earthquakes near Island County
Clallam County, WA 46 km (29 mi) E of here earthquakes near Clallam County
Kitsap County, WA 71 km (44 mi) NW of here earthquakes near Kitsap County
Mason County, WA 86 km (54 mi) N of here earthquakes near Mason County

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

Aftershocks so far

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

  1. 2.1 32 km S of Port Angeles East, Washington
  2. 2.1 5 km NE of Six Mile, Canada
  3. 2.0 4 km NE of Oak Bay, Canada
  4. 1.6 8 km NE of Jamestown, Washington
  5. 2.0 7 km NNE of Jamestown, Washington
  6. 2.6 18 km WSW of Quilcene, Washington
  7. 1.8 4 km SSW of Port Ludlow, Washington
  8. 2.2 16 km NNW of Jamestown, Washington
  9. 2.5 6 km ESE of Oak Bay, Canada
  10. 1.6 6 km SW of Port Hadlock-Irondale, Washington
  11. 1.8 5 km SW of Port Ludlow, Washington
  12. 1.9 3 km N of Langford, Canada
  13. 1.9 10 km WSW of Port Angeles, Washington
  14. 1.8 6 km WNW of Coupeville, Washington
  15. 3.0 6 km NE of Oak Bay, 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.