QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

16 km NNE of Jamestown, Washington

· 23 km deep · released about 1.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 26 kmIsland County 30 kmJefferson County 64 kmClallam County 66 kmKitsap County 76 kmSkagit County 94 kmSnohomish County 98 kmMason County 103 kmWhatcom County 109 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 3.3 (ml)
Depth
23 km below the surface
Felt
309 reports · strongest reported intensity III
Nearest
San Juan County, 26 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2870 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 309 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,600× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× more

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 48.2750, -123.0392. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 26 km (16 mi) S of here earthquakes near San Juan County
Island County, WA 30 km (19 mi) WNW of here earthquakes near Island County
Jefferson County, WA 64 km (39 mi) NE of here earthquakes near Jefferson County
Clallam County, WA 66 km (41 mi) ENE of here earthquakes near Clallam County
Kitsap County, WA 76 km (47 mi) NNW of here earthquakes near Kitsap County
Skagit County, WA 94 km (58 mi) WSW of here earthquakes near Skagit 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. 1.7 10 km SE of Friday Harbor, Washington
  2. 2.2 15 km SSE of Friday Harbor, Washington
  3. 2.2 12 km WNW of Ault Field, Washington
  4. 2.3 12 km NW of Ault Field, Washington
  5. 2.2 12 km WNW of Ault Field, Washington
  6. 1.7 12 km NW of Ault Field, Washington
  7. 1.7 5 km ENE of Anacortes, Washington
  8. 1.8 9 km NNW of Freeland, Washington
  9. 2.1 13 km SW of North Saanich, Canada
  10. 1.8 10 km NE of Port Angeles East, Washington
  11. 1.8 4 km NE of Anacortes, Washington
  12. 2.3 4 km N of Port Townsend, Washington
  13. 2.0 5 km NW of Jamestown, Washington
  14. 1.5 8 km SSE of Coupeville, Washington
  15. 2.0 7 km NNW 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.