QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

3 km SW of Oak Harbor, Washington

· 28 km deep · released about 88 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 12 kmSan Juan County 42 kmSkagit County 68 kmKitsap County 70 kmSnohomish County 71 kmJefferson County 82 kmWhatcom County 88 kmClallam County 92 kmKing County 107 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
28 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Island County, 12 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 417 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 88 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 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× 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 88 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 48.2702, -122.6685. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 12 km (8 mi) N of here earthquakes near Island County
San Juan County, WA 42 km (26 mi) SE of here earthquakes near San Juan County
Skagit County, WA 68 km (42 mi) WSW of here earthquakes near Skagit County
Kitsap County, WA 70 km (44 mi) N of here earthquakes near Kitsap County
Snohomish County, WA 71 km (44 mi) WNW of here earthquakes near Snohomish County
Jefferson County, WA 82 km (51 mi) NE of here earthquakes near Jefferson County

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

Aftershocks so far

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

  1. 1.6 4 km S of Port Ludlow, Washington
  2. 1.5 2 km E of Oak Harbor, Washington
  3. 2.0 2 km ESE of Oak Harbor, Washington
  4. 1.6 2 km ESE of Oak Harbor, Washington
  5. 2.4 2 km ESE of Oak Harbor, Washington
  6. 2.9 2 km ESE of Oak Harbor, Washington
  7. 2.1 5 km N of Anacortes, Washington
  8. 1.6 6 km SSW of Port Ludlow, Washington
  9. 2.2 5 km NW of Orcas, Washington
  10. 2.4 4 km SSW of Anacortes, Washington
  11. 2.0 5 km N of Anacortes, Washington
  12. 2.7 5 km N of Anacortes, Washington
  13. 1.5 2 km WNW of Arlington, Washington
  14. 1.8 4 km SSW of Anacortes, Washington
  15. 1.7 2 km S of River Road, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.5 on 2025-03-03 — it released about 1,900 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.