QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

6 km SSE of Port Ludlow, Washington

· 22 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 26 kmIsland County 32 kmJefferson County 65 kmSnohomish County 69 kmMason County 70 kmKing County 75 kmSan Juan County 78 kmSkagit County 93 kmClallam County 96 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
22 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 26 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 272 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 19 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 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 47.8735, -122.6560. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 26 km (16 mi) N of here earthquakes near Kitsap County
Island County, WA 32 km (20 mi) S of here earthquakes near Island County
Jefferson County, WA 65 km (41 mi) E of here earthquakes near Jefferson County
Snohomish County, WA 69 km (43 mi) WSW of here earthquakes near Snohomish County
Mason County, WA 70 km (43 mi) NNE of here earthquakes near Mason County
King County, WA 75 km (46 mi) NW of here earthquakes near King County

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

Aftershocks so far

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

  1. 1.7 3 km E of Oak Harbor, Washington
  2. 2.1 3 km ESE of Oak Harbor, Washington
  3. 2.1 3 km E of Oak Harbor, Washington
  4. 1.9 4 km E of Port Townsend, Washington
  5. 1.5 5 km ENE of Belfair, Washington
  6. 1.8 2 km ESE of Oak Harbor, Washington
  7. 1.9 3 km E of Oak Harbor, Washington
  8. 1.6 2 km SSW of Lake Forest Park, Washington
  9. 2.3 3 km ESE of Oak Harbor, Washington
  10. 2.3 5 km SE of Kingston, Washington
  11. 2.0 2 km E of Oak Harbor, Washington
  12. 2.3 2 km E of Oak Harbor, Washington
  13. 3.8 2 km E of Oak Harbor, Washington
  14. 2.4 2 km ESE of Oak Harbor, Washington
  15. 1.9 5 km WNW of White Center, 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 4,700 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.