QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

8 km WNW of La Conner, Washington

· 22 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 31 kmSan Juan County 38 kmSkagit County 58 kmWhatcom County 72 kmSnohomish County 74 kmKitsap County 88 kmJefferson County 98 kmClallam County 102 kmKing County 119 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 1.5 (ml)
Depth
22 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Island County, 31 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 415 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 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 48.4303, -122.5947. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 31 km (19 mi) N of here earthquakes near Island County
San Juan County, WA 38 km (24 mi) ESE of here earthquakes near San Juan County
Skagit County, WA 58 km (36 mi) W of here earthquakes near Skagit County
Whatcom County, WA 72 km (45 mi) SW of here earthquakes near Whatcom County
Snohomish County, WA 74 km (46 mi) NW of here earthquakes near Snohomish County
Kitsap County, WA 88 km (55 mi) N of here earthquakes near Kitsap County

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

Aftershocks so far

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

  1. 1.9 4 km E of Port Townsend, Washington
  2. 1.8 5 km E of Acme, Washington
  3. 1.8 2 km ESE of Oak Harbor, Washington
  4. 1.9 3 km E of Oak Harbor, Washington
  5. 2.3 3 km ESE of Oak Harbor, Washington
  6. 2.0 2 km E of Oak Harbor, Washington
  7. 2.3 2 km E of Oak Harbor, Washington
  8. 3.8 2 km E of Oak Harbor, Washington
  9. 2.4 2 km ESE of Oak Harbor, Washington
  10. 1.5 2 km E of Oak Harbor, Washington
  11. 2.0 2 km ESE of Oak Harbor, Washington
  12. 1.6 2 km ESE of Oak Harbor, Washington
  13. 2.4 2 km ESE of Oak Harbor, Washington
  14. 2.9 2 km ESE of Oak Harbor, Washington
  15. 2.1 5 km N of Anacortes, 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 31,000 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.