QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

4 km ENE of Oak Harbor, Washington

· 22 km deep · released about 8.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 17 kmSan Juan County 44 kmSkagit County 61 kmSnohomish County 67 kmKitsap County 74 kmWhatcom County 82 kmJefferson County 89 kmClallam County 99 kmKing County 106 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 1.6 (ml)
Depth
22 km below the surface
Felt
no reports yet
Nearest
Island County, 17 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 569 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 8.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.4 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 48.3030, -122.5898. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 17 km (11 mi) NNE of here earthquakes near Island County
San Juan County, WA 44 km (27 mi) ESE of here earthquakes near San Juan County
Skagit County, WA 61 km (38 mi) WSW of here earthquakes near Skagit County
Snohomish County, WA 67 km (42 mi) WNW of here earthquakes near Snohomish County
Kitsap County, WA 74 km (46 mi) N of here earthquakes near Kitsap County
Whatcom County, WA 82 km (51 mi) SW of here earthquakes near Whatcom County

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

Aftershocks so far

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

  1. 1.6 1 km WNW of Lake Cavanaugh, Washington
  2. 2.2 2 km N of Mount Vernon, Washington
  3. 1.8 3 km NW of Mount Vernon, Washington
  4. 1.8 5 km SW of Lake Cavanaugh, Washington
  5. 2.3 7 km SSE of Coupeville, Washington
  6. 2.2 5 km E of Big Lake, Washington
  7. 1.7 6 km NNW of Lofall, Washington
  8. 1.8 5 km S of Hansville, Washington
  9. 1.6 8 km NE of Jamestown, Washington
  10. 2.0 7 km NNE of Jamestown, Washington
  11. 1.8 2 km S of Clear Lake, Washington
  12. 1.6 4 km WNW of Freeland, Washington
  13. 1.5 6 km NNW of Lofall, Washington
  14. 1.6 1 km NNW of Mount Vernon, Washington
  15. 2.3 1 km W of Oak 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.