QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

34 km SSW of River Road, Washington

· 41 km deep · released about 490 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Jefferson County 14 kmMason County 51 kmClallam County 54 kmKitsap County 55 kmIsland County 64 kmSan Juan County 81 kmGrays Harbor County 84 kmThurston County 103 kmKing County 118 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
41 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Jefferson County, 14 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1499 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 490 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 31,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× 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 490 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 47.7985, -123.3420. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Jefferson County, WA 14 km (9 mi) E of here earthquakes near Jefferson County
Mason County, WA 51 km (32 mi) NNW of here earthquakes near Mason County
Clallam County, WA 54 km (33 mi) SE of here earthquakes near Clallam County
Kitsap County, WA 55 km (34 mi) WNW of here earthquakes near Kitsap County
Island County, WA 64 km (40 mi) SW of here earthquakes near Island County
San Juan County, WA 81 km (50 mi) SSW of here earthquakes near San Juan County

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

Aftershocks so far

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

  1. 1.8 6 km WSW of Port Hadlock-Irondale, Washington
  2. 1.7 7 km WSW of Quilcene, Washington
  3. 1.7 8 km SSW of Seabeck, Washington
  4. 1.8 29 km WNW of Hoodsport, Washington
  5. 2.6 6 km NW of Belfair, Washington
  6. 2.2 12 km NW of Port Angeles, Washington
  7. 1.7 10 km S of Seabeck, Washington
  8. 1.7 22 km WSW of Quilcene, Washington
  9. 1.6 13 km WNW of Belfair, Washington
  10. 1.6 10 km SSE of Port Angeles East, Washington
  11. 1.8 7 km SSE of Seabeck, Washington
  12. 1.5 11 km N of Quilcene, Washington
  13. 1.8 5 km SE of Quilcene, Washington
  14. 2.3 28 km NW of Hoodsport, Washington
  15. 3.4 17 km WSW of Brinnon, 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 4.1 on 2017-02-23 — it released about 83 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.