QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

13 km WNW of Orcas, Washington

· 21 km deep · released about 5.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 16 kmIsland County 64 kmClallam County 83 kmWhatcom County 96 kmSkagit County 97 kmJefferson County 99 kmKitsap County 118 kmSnohomish County 120 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
21 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
San Juan County, 16 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2821 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 5.7 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 2,600,000× 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 5.7 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 48.6537, -123.1102. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 16 km (10 mi) N of here earthquakes near San Juan County
Island County, WA 64 km (40 mi) NNW of here earthquakes near Island County
Clallam County, WA 83 km (52 mi) NE of here earthquakes near Clallam County
Whatcom County, WA 96 km (59 mi) WSW of here earthquakes near Whatcom County
Skagit County, WA 97 km (60 mi) W of here earthquakes near Skagit County
Jefferson County, WA 99 km (62 mi) NNE of here earthquakes near Jefferson 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 10 km WNW of Orcas, Washington
  2. 2.4 11 km W of Ault Field, Washington
  3. 2.0 9 km S of Friday Harbor, Washington
  4. 1.5 12 km ENE of North Saanich, Canada
  5. 3.0 10 km NW of Friday Harbor, Washington
  6. 1.6 6 km E of Oak Bay, Canada
  7. 1.6 10 km ESE of Point Roberts, Washington
  8. 2.3 11 km NNE of Six Mile, Canada
  9. 2.1 13 km N of Orcas, Washington
  10. 2.0 11 km NNW of Six Mile, Canada
  11. 1.7 3 km NNE of Six Mile, Canada
  12. 2.0 9 km NW of Friday Harbor, Washington
  13. 1.7 11 km WNW of Ault Field, Washington
  14. 1.5 3 km WNW of North Saanich, Canada
  15. 2.0 17 km NW 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.