QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

2 km W of Port Townsend, Washington

· 55 km deep · released about 7.1 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 10 kmSan Juan County 48 kmKitsap County 55 kmJefferson County 64 kmSnohomish County 77 kmClallam County 81 kmSkagit County 84 kmMason County 90 kmKing County 101 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 1.6 (ml)
Depth
55 km below the surface
Felt
no reports yet
Nearest
Island County, 10 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 189 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 7.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.1 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 48.1208, -122.8000. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 10 km (7 mi) WSW of here earthquakes near Island County
San Juan County, WA 48 km (30 mi) SSE of here earthquakes near San Juan County
Kitsap County, WA 55 km (34 mi) NNW of here earthquakes near Kitsap County
Jefferson County, WA 64 km (40 mi) ENE of here earthquakes near Jefferson County
Snohomish County, WA 77 km (48 mi) W of here earthquakes near Snohomish County
Clallam County, WA 81 km (50 mi) E of here earthquakes near Clallam County

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

Aftershocks so far

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

  1. 1.7 0 km W of Lake Stickney, Washington
  2. 2.1 6 km ENE of Bell Hill, Washington
  3. 2.6 2 km ENE of Mount Vernon, Washington
  4. 1.6 2 km ESE of Oak Harbor, Washington
  5. 1.6 8 km S of Port Hadlock-Irondale, Washington
  6. 2.5 11 km SSW of River Road, Washington
  7. 1.6 2 km E of Oak Harbor, Washington
  8. 1.6 5 km SSE of Quilcene, Washington
  9. 2.1 3 km E of Oak Harbor, Washington
  10. 1.7 3 km E of Oak Harbor, Washington
  11. 2.1 3 km ESE of Oak Harbor, Washington
  12. 2.1 3 km E of Oak Harbor, Washington
  13. 1.9 14 km NNE of Port Angeles East, Washington
  14. 1.9 4 km E of Port Townsend, Washington
  15. 1.8 2 km ESE of Oak 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2023-10-09 — it released about 12,000 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.