QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

3 km S of Marietta, Washington

· 12 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 48 kmWhatcom County 55 kmSkagit County 63 kmIsland County 67 kmSnohomish County 98 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 1.9 (ml)
Depth
12 km below the surface
Felt
no reports yet
Nearest
San Juan County, 48 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2826 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 48.7580, -122.5758. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 48 km (30 mi) NE of here earthquakes near San Juan County
Whatcom County, WA 55 km (34 mi) W of here earthquakes near Whatcom County
Skagit County, WA 63 km (39 mi) WNW of here earthquakes near Skagit County
Island County, WA 67 km (42 mi) N of here earthquakes near Island County
Snohomish County, WA 98 km (61 mi) NW of here earthquakes near Snohomish County
Clallam County, WA 121 km (75 mi) NE of here earthquakes near Clallam 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. 3.0 10 km NW of Friday Harbor, Washington
  2. 1.6 10 km ESE of Point Roberts, Washington
  3. 2.1 13 km N of Orcas, Washington
  4. 2.0 9 km NW of Friday Harbor, Washington
  5. 1.7 11 km WNW of Ault Field, Washington
  6. 1.8 8 km ESE of Abbotsford, Canada
  7. 1.6 8 km N of Peaceful Valley, Washington
  8. 1.6 8 km N of Peaceful Valley, Washington
  9. 2.0 17 km NW of Orcas, Washington
  10. 1.6 5 km NW of Burlington, Washington
  11. 1.8 13 km WSW of Anacortes, Washington
  12. 1.5 7 km W of Orcas, Washington
  13. 2.6 9 km NW of Friday Harbor, Washington
  14. 1.8 4 km NW of Orcas, Washington
  15. 1.7 10 km SE of Friday 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.