QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

16 km SSW of River Road, Washington

· 44 km deep · released about 510 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Jefferson County 28 kmIsland County 47 kmKitsap County 53 kmClallam County 55 kmSan Juan County 64 kmMason County 65 kmGrays Harbor County 102 kmSnohomish County 108 kmKing 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 2.8 (ml)
Depth
44 km below the surface
Felt
11 reports · strongest reported intensity IV
Nearest
Jefferson County, 28 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 338 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 11 people have reported feeling it to USGS.

How big was it?

This earthquake released about 510 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 30,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 21,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 510 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 47.9327, -123.2025. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Jefferson County, WA 28 km (17 mi) ENE of here earthquakes near Jefferson County
Island County, WA 47 km (29 mi) WSW of here earthquakes near Island County
Kitsap County, WA 53 km (33 mi) NW of here earthquakes near Kitsap County
Clallam County, WA 55 km (34 mi) ESE of here earthquakes near Clallam County
San Juan County, WA 64 km (40 mi) S of here earthquakes near San Juan County
Mason County, WA 65 km (40 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

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

  1. 2.1 6 km ENE of Bell Hill, Washington
  2. 1.8 34 km NE of Amanda Park, Washington
  3. 1.7 35 km NE of Amanda Park, Washington
  4. 1.6 8 km S of Port Hadlock-Irondale, Washington
  5. 2.5 11 km SSW of River Road, Washington
  6. 1.6 5 km SSE of Quilcene, Washington
  7. 1.9 14 km NNE of Port Angeles East, Washington
  8. 1.9 4 km E of Port Townsend, Washington
  9. 1.6 4 km S of Port Ludlow, Washington
  10. 1.8 21 km S of Port Angeles East, Washington
  11. 1.6 6 km SSW of Port Ludlow, Washington
  12. 2.4 40 km NE of Amanda Park, Washington
  13. 2.4 11 km S of Metchosin, Canada
  14. 2.0 35 km NE of Amanda Park, Washington
  15. 1.7 2 km S of River Road, 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 170 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.