QuakeIndex

Earthquake · reviewed by a seismologist

M 4.3ml

Port Townsend, WA

· 55 km deep · released about 44 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Island County 14 kmKitsap County 45 kmSan Juan County 59 kmJefferson County 65 kmSnohomish County 72 kmMason County 83 kmSkagit County 84 kmClallam County 86 kmKing County 91 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 4.3 (ml)
Depth
55 km below the surface
Felt
14568 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Island County, 14 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 296 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 14568 people have reported feeling it to USGS.

How big was it?

This earthquake released about 44 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 3,800× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 170× the energy of this one
  3. Magna, Utah 2020 M 5.7 120× the energy of this one
  4. This earthquake M 4.3 about 44 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 92× more

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 48.0402, -122.7308. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Island County, WA 14 km (9 mi) SSW of here earthquakes near Island County
Kitsap County, WA 45 km (28 mi) N of here earthquakes near Kitsap County
San Juan County, WA 59 km (37 mi) SSE of here earthquakes near San Juan County
Jefferson County, WA 65 km (40 mi) ENE of here earthquakes near Jefferson County
Snohomish County, WA 72 km (45 mi) W of here earthquakes near Snohomish County
Mason County, WA 83 km (52 mi) NNE of here earthquakes near Mason County

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

Aftershocks so far

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

  1. 1.6 1 km NE of Mill Creek, Washington
  2. 2.3 7 km ESE of Quilcene, Washington
  3. 2.2 7 km E of Quilcene, Washington
  4. 1.5 6 km WNW of Lofall, Washington
  5. 1.7 5 km WSW of Clinton, Washington
  6. 1.6 5 km N of Port Townsend, Washington
  7. 1.8 6 km WSW of Port Hadlock-Irondale, Washington
  8. 1.7 7 km WSW of Quilcene, Washington
  9. 1.8 4 km SSW of Port Ludlow, Washington
  10. 1.6 7 km ESE of Quilcene, Washington
  11. 1.8 5 km NE of Kingston, Washington
  12. 1.9 3 km W of Mount Vernon, Washington
  13. 2.0 9 km W of Coupeville, Washington
  14. 1.8 4 km NNW of Port Townsend, Washington
  15. 1.6 4 km SW of Port Ludlow, 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.