QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

13 km WNW of Ault Field, Washington

· 23 km deep · released about 160 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 23 kmIsland County 29 kmSkagit County 77 kmJefferson County 82 kmClallam County 83 kmKitsap County 85 kmSnohomish County 88 kmWhatcom County 90 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 2.5 (ml)
Depth
23 km below the surface
Felt
5 reports · strongest reported intensity III
Nearest
San Juan County, 23 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1776 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 160 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 95,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 68,000× the energy of this one
  3. Around the size people start to feel M 3.0 6× the energy of this one
  4. This earthquake M 2.5 about 160 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 48.3902, -122.8440. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 23 km (14 mi) SE of here earthquakes near San Juan County
Island County, WA 29 km (18 mi) NNW of here earthquakes near Island County
Skagit County, WA 77 km (48 mi) W of here earthquakes near Skagit County
Jefferson County, WA 82 km (51 mi) NE of here earthquakes near Jefferson County
Clallam County, WA 83 km (52 mi) ENE of here earthquakes near Clallam County
Kitsap County, WA 85 km (53 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

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

  1. 2.6 21 km S of Friday Harbor, Washington
  2. 1.7 Washington
  3. 3.1 6 km N of Camano, Washington
  4. 2.2 3 km NW of Victoria, Canada
  5. 1.5 Washington
  6. 1.6 8 km WNW of Friday Harbor, Washington
  7. 1.8 9 km NW of Friday Harbor, Washington
  8. 1.7 1 km NNW of River Road, Washington
  9. 2.0 13 km W of Ault Field, Washington
  10. 2.0 10 km E of Oak Bay, Canada
  11. 2.6 Washington-British Columbia border region
  12. 1.9 4 km ENE of La Conner, Washington
  13. 2.3 6 km WNW of Orcas, Washington
  14. 1.6 6 km W of Orcas, Washington
  15. 2.7 6 km WNW of Orcas, 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.