QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

6 km SSW of River Road, Washington

· 41 km deep · released about 22 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Jefferson County 35 kmIsland County 41 kmClallam County 54 kmSan Juan County 54 kmKitsap County 58 kmMason County 74 kmSnohomish County 105 kmGrays Harbor County 112 kmSkagit County 114 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
41 km below the surface
Felt
no reports yet
Nearest
Jefferson County, 35 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 622 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 22 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 5.8 680,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 480,000× the energy of this one
  3. Around the size people start to feel M 3.0 43× the energy of this one
  4. This earthquake M 1.9 about 22 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 48.0200, -123.1772. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Jefferson County, WA 35 km (22 mi) NE of here earthquakes near Jefferson County
Island County, WA 41 km (25 mi) WSW of here earthquakes near Island County
Clallam County, WA 54 km (34 mi) E of here earthquakes near Clallam County
San Juan County, WA 54 km (34 mi) S of here earthquakes near San Juan County
Kitsap County, WA 58 km (36 mi) NW of here earthquakes near Kitsap County
Mason County, WA 74 km (46 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

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

  1. 2.5 11 km SSW of River Road, Washington
  2. 1.6 5 km SSE of Quilcene, Washington
  3. 1.9 14 km NNE of Port Angeles East, Washington
  4. 1.9 4 km E of Port Townsend, Washington
  5. 1.6 4 km S of Port Ludlow, Washington
  6. 1.8 21 km S of Port Angeles East, Washington
  7. 1.6 6 km SSW of Port Ludlow, Washington
  8. 2.4 40 km NE of Amanda Park, Washington
  9. 2.4 11 km S of Metchosin, Canada
  10. 2.0 35 km NE of Amanda Park, Washington
  11. 1.7 2 km S of River Road, Washington
  12. 2.1 6 km NNW of Lofall, Washington
  13. 1.6 2 km W of Port Townsend, Washington
  14. 1.6 3 km W of Quilcene, Washington
  15. 1.6 2 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2023-10-09 — it released about 4,000 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.