QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

16 km SSE of Friday Harbor, Washington

· 47 km deep · released about 85 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 18 kmIsland County 33 kmClallam County 78 kmJefferson County 79 kmSkagit County 83 kmKitsap County 87 kmSnohomish County 94 kmWhatcom County 95 kmMason County 118 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 2.3 (ml)
Depth
47 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
San Juan County, 18 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1254 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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 48.3950, -122.9312. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 18 km (11 mi) SE of here earthquakes near San Juan County
Island County, WA 33 km (20 mi) NW of here earthquakes near Island County
Clallam County, WA 78 km (48 mi) ENE of here earthquakes near Clallam County
Jefferson County, WA 79 km (49 mi) NE of here earthquakes near Jefferson County
Skagit County, WA 83 km (52 mi) W of here earthquakes near Skagit County
Kitsap County, WA 87 km (54 mi) NNW of here earthquakes near Kitsap 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. 2.8 10 km WSW of Friday Harbor, Washington
  2. 1.9 3 km W of Mount Vernon, Washington
  3. 2.0 9 km W of Coupeville, Washington
  4. 1.8 4 km NNW of Port Townsend, Washington
  5. 1.9 6 km NNE of Orcas, Washington
  6. 2.1 11 km E of North Saanich, Canada
  7. 1.5 11 km WNW of Ault Field, Washington
  8. 4.0 12 km E of Saanichton, Canada
  9. 1.6 1 km SE of Six Mile, Canada
  10. 2.0 1 km SE of Coupeville, Washington
  11. 1.6 10 km W of Marietta, Washington
  12. 1.8 10 km W of Marietta, Washington
  13. 1.5 4 km SSW of Marietta, Washington
  14. 1.7 12 km WNW of Orcas, Washington
  15. 1.6 9 km NW of Friday Harbor, 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.