QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

12 km NNE of Port Angeles East, Washington

· 2.9 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan County 36 kmClallam County 43 kmJefferson County 48 kmIsland County 49 kmKitsap County 81 kmMason County 97 kmSkagit County 116 kmSnohomish County 117 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 1.8 (ml)
Depth
2.9 km below the surface
Felt
no reports yet
Nearest
San Juan County, 36 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2731 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 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 48.2143, -123.3265. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Juan County, WA 36 km (23 mi) SSW of here earthquakes near San Juan County
Clallam County, WA 43 km (27 mi) ENE of here earthquakes near Clallam County
Jefferson County, WA 48 km (30 mi) NNE of here earthquakes near Jefferson County
Island County, WA 49 km (30 mi) W of here earthquakes near Island County
Kitsap County, WA 81 km (51 mi) NW of here earthquakes near Kitsap County
Mason County, WA 97 km (60 mi) N of here earthquakes near Mason County

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

Aftershocks so far

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

  1. 2.1 32 km S of Port Angeles East, Washington
  2. 2.1 5 km NE of Six Mile, Canada
  3. 2.0 4 km NE of Oak Bay, Canada
  4. 1.6 8 km NE of Jamestown, Washington
  5. 2.0 7 km NNE of Jamestown, Washington
  6. 2.6 18 km WSW of Quilcene, Washington
  7. 2.2 16 km NNW of Jamestown, Washington
  8. 2.5 6 km ESE of Oak Bay, Canada
  9. 1.6 9 km E of North Saanich, Canada
  10. 1.6 6 km SW of Port Hadlock-Irondale, Washington
  11. 1.9 3 km N of Langford, Canada
  12. 1.9 10 km WSW of Port Angeles, Washington
  13. 1.7 8 km NNW of Friday Harbor, Washington
  14. 3.0 6 km NE of Oak Bay, Canada
  15. 2.5 9 km NW 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.